Historic Preservation - Technical Procedures |
 Spectitle: | Stripping And Repainting Metal Doors |
Procedure code: | 0810001R |
Source: | National Capitol Region Specifications |
Division: | Doors And Windows |
Section: | Metal Doors & Frames |
Last Modified: | 02/24/2012 |
Details: | Stripping And Repainting Metal Doors STRIPPING AND REPAINTING METAL DOORS PART 1---GENERAL 1.01 SUMMARY A. This procedure includes guidance on stripping, surface preparation, priming and finishing of scratched painted metal doors. B. See 01100-07-S for general project guidelines to be reviewed along with this procedure. These guidelines cover the following sections: 1. Safety Precautions 2. Historic Structures Precautions 3. Submittals 4. Quality Assurance 5. Delivery, Storage and Handling 6. Project/Site Conditions 7. Sequencing and Scheduling 8. General Protection (Surface and Surrounding) These guidelines should be reviewed prior to performing this procedure and should be followed, when applicable, along with recommendations from the Regional Historic Preservation Officer (RHPO). 1.02 DEFINITIONS A. "Paint" as used herein means all coating systems materials, including primers, emulsions, enamels, sealers and fillers, and other applied materials whether used as prime, intermediate or finish coats. 1.03 SUBMITTALS A. Product Data: Submit manufacturer s technical information including paint label analysis and application instructions for each material proposed for use. 1. Finish color and primer tints shall be as approved by the RHPO. 2. Prior to beginning work, the Contractor will submit two samples of each color with texture and gloss level to simulate actual conditions for review by the Contracting Officer. Resubmit samples as requested by the Contracting Officer until an acceptable sheen, color, and texture of the paint if achieved. 3. Base coats and undercoats of paint enamel shall be tinted or shaded as directed. Tinting and shading colors are not to be considered as separate colors and no extra or additional payment will be made for such tinting and shading work. 1.04 QUALITY ASSURANCE A. Regulatory Requirements: Provide primers and other undercoat paint produced by same manufacturer as finish coats. Use only thinners approved by paint manufacturer, and use only within recommended limits. B. Mock-Ups: Prior to beginning work, the Contractor shall prepare on-site color mock-ups for the Owner s approval. 1. One painted metal office door. 2. Mock-ups shall be prepared until a satisfactory sample is approved by the Contracting Officer. Retain acceptable mock-ups in undisturbed condition, suitably marked, during construction as a standard for judging completed work. 3. The colors and surface finishes of the approved mock-ups shall be matched in the completed work by the Contractor who shall do all mixing and blending necessary to achieve this result. 1.05 DELIVERY, STORAGE AND HANDLING A. Storage and Protection: 1. Storage space for all materials used on the job shall be designated by the Contracting Officer. The Contractor shall provide a lock and key, and shall secure local Fire Department permit if needed for the storage and use of paint materials. 2. Paints and other flammable products shall not be stored in the building. Keep storage space neat and clean. Soiled or used rags, waste and trash shall be removed from the job site daily, at the end of each day's work, and every precaution shall be taken to avoid the danger of fire. 1.06 PROJECT/SITE CONDITIONS A. Environmental Requirements: 1. Ventilation in mixing and application areas shall be suitable for application, drying, and curing of paint and safe dissipation of solvent fumes. 2. Air shall not be dust-laden prior to, during or after painting operations. 1.07 SEQUENCING AND SCHEDULING A. Coordinating Work: Coordinate painting so that it will not conflict with the work of other trades and building operations. PART 2---PRODUCTS 2.01 MANUFACTURERS A. Benjamin Moore Co. 51 Chestnut Ridge Road Montvale, NJ 07645 201/573-9600 B. The Sherwin-Williams Company 101 Prospect Ave. N.W. Cleveland, OH 44101 216/566-2000 C. Glidden Coatings and Resins Div. of SCM Corp. 925 Euclid Avenue Cleveland, OH 44115 216/344-8216 D. All painting specifications for General Services Administration historic properties shall include the following clause in the Special Conditions Section: "All paint will be custom tinted by computer matching. Color selection must follow the codes indicated on the finish schedule. Accurate color reproduction is accomplished by matching modern paints to the sample color chips corresponding to each code. There are two coding systems for describing color. They are the Munsell and Plochere color systems. E. The contractor must obtain the coded color chips for each color indicated in the finish schedule. Chips are to be purchased directly from the following firm(s): Munsell Color System 2441 N. Calvert Street Baltimore, MD 21218 (301) 243-2171 Plochere Color System 1818 Hyperion Avenue Los Angeles, CA 90002 (213) 661-0070 1. Chips range from $2 to $7. Coded color chips must be computer matched. Major paint manufacturers known to be capable of computer color matching include Sherwin Williams, Benjamin Moore, and Duron. Visual matching is not acceptable. 2. Written verification of having had coded color chips computer matched to paints will be submitted to the Contracting Officer 48 hours prior to painting. These verifications must be written on paint manufacturer's stationery and hand signed by the individual conducting the computer color matching. No substitution for coded colors will be accepted." F. Klean Strip, Inc. Division of W.M. Barr Inc. Memphis, Tennessee G. Pyrock Chemical Company Long Island City, New York H. Govgeon Brothers, Inc. Bay City, Michigan 2.02 MATERIALS A. Provide best quality grade of various types of coatings as regularly manufactured by acceptable paint materials manufacturers, such as Benjamin Moore, Sherwin Williams, Glidden Coatings and Resins, or approved equal. Materials not displaying manufacturer's identification as a standard, best-grade product will not be acceptable. B. Color Pigments: Pure, non-fading, applicable types to suit substrates and service indicated. 1. Lead content in pigment, if any, is limited to contain not more than 0.5% lead, as lead metal based on the total non-volatile (dry-film) of paint by weight. C. General: 1. Paint shall be well ground, shall not settle badly, cake or thicken in the container, shall be readily broken with a paddle to a smooth consistency and shall have easy brushing properties. 2. Paint shall arrive on the job ready-mixed except for tinting of undercoats and possible thinning. 3. All thinning and tinting materials, solvents and other materials used with paint shall be the best quality and type recommended by the paint manufacturer. 4. Application equipment is not required to be new, but shall be adequate and commensurate for the work and workmanship required herein. D. Stripper: Methylene chloride paint stripper such as "Kwick Superfast Paint and Varnish Remover" (Klean Strip, Inc.), "Rock Miracle" (Pyrock Chemical Company), or approved equal. NOTE: THE CHEMICAL METHYLENE CHLORIDE IS BANNED IN SOME STATES SUCH AS CALIFORNIA. REGULATORY INFORMATION AS WELL AS ALTERNATIVE OR EQUIVALENT CHEMICALS MAY BE REQUESTED FROM THE ENVIRONMENTAL PROTECTION AGENCY (EPA) REGIONAL OFFICE AND/OR THE STATE OFFICE OF ENVIRONMENTAL QUALITY. E. Epoxy Based Filler (for scratched metal doors): #407 Low Density Filler mixed with #105/205 Resin-Hardener system (Govgeon Brothers, Inc.), or approved equal. 2.03 MIXES A. Mix and prepare painting materials in accordance with manufacturer s directions. B. Maintain containers used in mixing and application of paint in a clean condition, free of foreign materials and residue. C. Stir materials before application to produce a mixture of uniform density, and stir as required during application. Do not stir surface film into material. Remove film and, if necessary, strain material before using. PART 3---EXECUTION 3.01 EXAMINATION A. Verification of Conditions: 1. Inspect the work for any serious defects or conditions which would interfere or prevent a satisfactory application of materials under this Section. 2. Do not proceed with the work until corrections have been made. Application shall be deemed acceptance of the related surfaces. 3. No painting shall be performed until surfaces have been properly prepared. Beginning work shall constitute acceptance of base surfaces as found and any subsequent failure or development of defects in the painting work shall be corrected at no additional expense to the Government. 3.02 PREPARATION A. Protection: 1. Do not paint over any code-required labels, such as Underwriters' Laboratories and Factory Mutual, or any equipment identification, performance rating, name, or nomenclature plates. 2. Caution shall be observed in painting not to daub any bright or plated work adjacent to painted areas and not to spatter marble or other finished work. 3. Protect work of other trades, whether to be painted or not, against damage by painting and finishing work. Correct any damage by cleaning, repainting, repairing or replacing, as acceptable to the Contracting Officer. 4. Provide "Wet Paint" signs as required to protect newly painted finishes. Remove temporary protective wrappings provided by others for protection of their work, after completion of painting operations. 5. At completion of work of other trades, touch-up and restore all damaged or defaced painting work specified herein. B. Surface Preparation: 1. Perform preparation and cleaning procedures in accordance with paint manufacturer's instructions and as herein specified, for each particular substrate condition. CAUTION: PAINT MAY CONTAIN LEAD. FOLLOW EPA REGULATIONS AND SAFETY GUIDELINES INCLUDING THOSE REQUIRED FOR THE REMOVAL AND DISPOSAL OF LEAD-BASED PAINT. 2. Provide barrier coats over incompatible primers or remove and reprime as required. Notify Contracting Officer in writing of any anticipated problems in using the specified coating systems with substrates primed by others. 3. Remove hardware, hardware accessories, machined surfaces, plates, lighting fixtures, and similar items in place and not to be finish-painted, or provide surface-applied protection prior to surface preparation and painting operations. Remove, if necessary, for complete painting of items and adjacent surfaces. Following completion of painting of each space or area, reinstall removed items. 4. Clean surfaces to be painted before applying paint or surface treatments. Remove oil and grease prior to mechanical cleaning. Prior to painting, surfaces shall be clean, dry and free of foreign materials which will adversely affect adhesion of appearance of the applied coating. 5. Program cleaning and painting so that contaminants from cleaning process will not fall onto wet, newly-painted surfaces. 3.03 ERECTION, INSTALLATION, APPLICATION A. Stripping Scratched Painted Metal Interior Doors: 1. Apply stripping materials to entire surface in accordance with manufacturer's recommendations and to match the results obtained in the approved test applications. Provide neutralizers, cleaning agents and other related materials recommended by the stripper manufacturer. 2. Perform stripping in a manner which results in uniform stripping of all surfaces without streaking or damage to substrate. Use tools that will not gouge or disfigure the substrate. 3. On completion of stripping, clean all residue from treated surfaces with damp sponge and neutralize area as required. Surface shall be free of oil and containments that may affect the adhesion of filler and paint. 4. If substrate exhibits superficial scratches, polish out in an even plane with successively finer grades of wet and dry sandpaper (#180-#400). Fill gouges and deep scratches with epoxy filler prior to sanding in accordance with manufacturer's recommendations. 5. Upon completion of filling and sanding, wipe surfaces with a tack cloth. B. Repainting Metal Doors: 1. General: Apply paint in accordance with manufacturer's directions. Use applicators and techniques best suited for substrate and type of material being applied. a. Paint colors, surface treatments, and finishes, to be approved by RHPO. b. Provide finish coats which are compatible with prime paints used. c. Apply additional coats when undercoats, stains or other conditions show through final coat of paint, until paint film is of uniform finish, color and appearance. Give special attention to ensure that surfaces, including edges, corners, crevices, welds, and exposed fasteners receive a dry film thickness equivalent to that of flat surfaces. 2. Scheduling Painting: Apply first-coat material to surfaces that have been cleaned, pretreated or otherwise prepared for painting as soon as practicable after preparation and before subsequent surface deterioration. a. Allow sufficient time between successive coatings to permit proper drying. b. Do not recoat until paint has dried to a firm, undeformed, unsticky surface under moderate thumb pressure, and application of another coat of paint does not cause lifting or loss of adhesion of the undercoat. 3. Minimum Coating Thickness: Apply materials at not less than manufacturer's recommended spreading rate, to establish a total dry film thickness as indicated or, if not indicated, as recommended by coating manufacturer. 4. Prime Coats: a. Apply prime coat on material which is required to be painted or finished, and which has not already been prime coated. b. Recoat primed and sealed surfaces where there is evidence of suction spots or unsealed areas in first coat, to assure a finish coat with no burn-through or other defects due to insufficient sealing. 5. Pigmented (Opaque) Finishes: Completely cover to provide an opaque, smooth surface of uniform finish, color, appearance and coverage. Cloudiness, spotting, holidays, laps, brush marks, runs, sags, ropiness or other surface imperfections will not be acceptable. 6. Completed Work: Match approved samples for color, texture and coverage. Remove, refinish or repaint work not in compliance with specified requirements. 3.04 ADJUSTING/CLEANING A. Clean-Up: 1. During progress of work, remove from site discarded paint materials, rubbish, cans and rags at end of each work day. 2. Upon completion of painting work, clean window glass and other paint-spattered surfaces. Remove spattered paint by proper methods of washing and scraping, using care not to scratch or otherwise damage finished surfaces. END OF SECTION |
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