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Historic Preservation - Technical Procedures
Cleaning And Repainting Exterior Aluminum
National Capitol Region Specifications - Va Building
Cleaning And Repainting Exterior Aluminum
CLEANING AND REPAINTING EXTERIOR ALUMINUM
A. This procedure includes guidance on cleaning polish-
finished, bare satin-finished, and non-finished exterior
aluminum, and repainting.
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
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 QUALITY ASSURANCE
A. Submit all cleaning products to the Contracting Officer
for approval prior to use on the job.
B. Test cleaning areas will be approved by the Contracting
Officer before any large scale cleaning is begun.
C. Standards: Architectural Aluminum Metals Association
Guidelines for the Cleaning of Aluminum, including
specification 609.1 (available from the AAMA, 35 East
Wacker Drive, Chicago IL 60601).
D. Follow paint manufacturer's printed instructions for
surface preparation, application and clean up.
1.03 PROJECT/SITE CONDITIONS
A. Existing Conditions:
1. All painting shall be executed at a temperature
between 50 F and 85 F at a relative humidity below
2. If mild acid is used, protect adjacent surfaces
A. The Procter & Gamble Company
P.O. Box 599
Cincinnati, OH 45201
B. ProSoCo, Inc.
755 Minnesota Avenue
P.O. Box 1578
Kansas City, KS 66117
800/255-4255 or 913/281-2700
C. The Sherwin Williams Co.
101 Prospect Ave. N.W.
Cleveland, OH 44101
D. Devcon Corporation
30 Endicott Street
Danvers, MA 01923
1. Mild soap, such as "Ivory Liquid" (Procter and
Gamble), or approved equal.
2. Phosphoric acid cleaner with water, such as "Sure
Klean Aluminum Cleaner" (ProSoCo, Inc.), or
B. Scrub-brushes shall be natural (non-metallic), bristle
1. Primer: Alkyd-base, such as "Zinc Chromate Primer"
(Sherwin Williams), or approved equal.
2. Finish Coats (2): Alkyd-base, such as "Industrial
Enamel" (Sherwin Williams), or approved equal.
D. Metal Filler: Two-part epoxy metal filler, putty-grade,
such as "Plastic Steel A" (Devcon Corporation), or
A. Protection: Prior to beginning work, mask and protect
all surfaces which would be altered or damaged by the
B. Surface Preparation: Determine that surfaces to which
paint is to be applied are even, smooth, sound, clean,
dry and free from defects affecting proper application.
Contact the Contracting Officer after surfaces which are
to be repainted have been cleaned, made smooth, and
before any paint is applied.
3.02 ERECTION, INSTALLATION, APPLICATION
A. Cleaning Aluminum:
1. Wash all aluminum surfaces with mild detergent such
as "Ivory Liquid" and clean water using a damp
sponge, soft cloth, or if necessary, a natural
bristle brush and light pressure. Wipe dry with
2. Should stronger cleaning methods be required, a
dilute phosphoric acid cleaner, such as "Sure-Klean
Aluminum Cleaner, pH 0.9" can be used, following,
carefully, the manufacturer's written instructions.
B. Painting Aluminum:
1. Remove all paint, rust and scale from all steel
surfaces, especially undersides and hidden
locations, by mechanical and manual methods as
necessary down to bright metal removing all traces
of rust and scale.
2. Replace or repair any badly deteriorated pieces of
metal work to match the original in size, shape and
3. Clean the bare metal of all oily or greasy residue
with a degreaser, such as trichlorethylene
available commercially in standard metal
4. Fill all small holes, depressions and cracks with
metal filler following the manufacturer's written
directions. Finish all filled areas by sanding
flush after curing time has elapsed.
5. Prime all metal within two hours of cleaning down
to bare metal using color obviously different from
the finish color.
6. Brush-apply two finish coats of paint.
END OF SECTION