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Historic Preservation - Technical Procedures

Spectitle:

Staining And Lacquering Woodwork

Procedure code:

0640014R

Source:

National Capitol Region Specifications

Division:

Wood And Plastics

Section:

Architectural Woodwork

Last Modified:

02/24/2012

Details:

Staining And Lacquering Woodwork



STAINING AND LACQUERING WOODWORK


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on staining and
         lacquering damaged areas of previously stained and
         lacquered woodwork.

    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).


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Mohawk Finishing Products, Inc.
         Route 30 N.
         Amsterdam, NY 12010

2.02 MATERIALS

    A.   Wood Filler:  Paste wood filler shall be blended silica
         in aromatic mineral spirits solvent with an alkyd resin
         base, color as required to match original stain (Mohawk
         Finishing Products, Inc.), or approved equal.  

         NOTE:  USE OF WOOD FILLER WITH LINSEED OIL VEHICLE MAY
         CAUSE WHITE SPOTS IN LACQUER FINISH COAT OR INHIBIT ITS
         PROPER DRYING.

    B.   Sanding Sealer:  Lacquer based sanding sealer, formulated
         for brushing, composed of the following products (Mohawk
         Finishing Products), or approved equal.

         Note:  Amounts of products listed below make one (1)
         gallon of sanding sealer.  The ratio of constituents
         shall remain constant if a greater quantity is required.

         Product                                                        Amount
         #610-160 High solids sanding sealer          50 oz.
         #650-010 Lacquer thinner                           12 oz.
         #502-000 Solar lux retarder                          2 oz.

    C.   Wood stain: Solvent (aromatic) reducible, pigmented
         wiping surface stain with an alkyd binder, color matched
         to original stain, such as (Mohawk Finishing Products,
         Inc.), or approved equal.

    D.   Lacquer

    E.   Tack Rags

    F.   Steel wool: Grade 0000

    G.   Cloths:  Soft, clean and lint free

    H.   Vegetable Oil Soap:  Potassium soap of vegetable oil
         containing no acids, abrasives, caustics or solvents,
         such as "Murphy's Oil Soap" (Murphy-Phoenix Company), OR
         approved equal.

         NOTE:  NON-IONIC DETERGENTS ARE NOT RECOMMENDED; THEY ARE
         TOO HARSH.

2.03 EQUIPMENT

    A.   Soft, Natural Bristle Brush


PART 3---EXECUTION

3.01 PREPARATION

    A.   Surface Preparation:

         1.   Lightly sand abraded veneer of windows and areas
              damaged by chairs.

         2.   Make sure that all wood surfaces are clean and
              smooth.

         3.   Fill all gouges and scratches with compatible
              surface putty color matched to stain.  Sand smooth.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   Staining Procedures:

         1.   Color mix stain to match original.

         2.   Apply stain to all bare wood surfaces with a stiff
              flat bristle brush.

         3.   Allow stain to set as required for proper color
              match as determined by testing process.

         4.   Wipe off excess stain by rubbing parallel to the
              grain with a soft, dry cloth.

         5.   Apply one (1) coat of sanding sealer rub with 0000
              steel wool and wipe with a tack rag.  (May not be
              required, test during preparation of sample areas.)

    B.   Finish Coating:

         1.   Make sure that surface is clean, level and free of
              defects.

         2.   Rub with 0000 steel wool and wipe with a tack rag.

         3.   Apply a minimum of three finish coats.  Brush on
              lacquer using a wide, moderately full brush to flow
              a continuous, wet coat onto the surface with
              minimum of retrace or back brushing - preferably
              none.  Work area small enough so that by working
              with long, fast, continuous strokes, each
              succeeding stroke works against the wet edge of the
              last stroke.  A dry tack rag moving ahead of the
              brush will help to keep the surface dust free.

         4.   Allow each coat to dry at least two, preferably
              four hours.

         5.   Sand with 4/0 to 6/0 paper, only if necessary to
              remove defects and level surface for next coat.

         6.   Before adding the next coat, vacuum and wipe the
              surface with a dry tack rag in order to remove all
              grit and dust.

                         END OF SECTION