b.
Repair of Minor Defects: Prior to painting, repair joints,
cracks, holes, surface irregularities, and other minor defects
with patching plaster or spackling compound and sand smooth.
c.
Allowable Moisture Content: Latex coatings may be applied to damp
surfaces, but not surfaces with droplets of water. Do not apply
epoxies to damp surfaces as determined by ASTM D 4263. New
plaster to be coated shall have a maximum moisture content of 8
percent, when measured in accordance with ASTM D 4444, Method A,
unless otherwise authorized. In addition to moisture content
requirements, allow new plaster to age a minimum of 30 days before
preparation for painting.
3.6.3
Existing Asbestos Cement Surfaces
Remove oily stains by solvent cleaning with mineral spirts, [CID A-A-2904][
ASTM D 235]. Remove loose dirt, dust, and other deleterious substances by
brushing with a soft brush or rubbing with a dry cloth prior to application
of the first coat material. Do not wire brush or clean using other
abrasive methods. Surfaces shall be dry and clean prior to application of
the coating.
3.7
PREPARATION OF WOOD AND PLYWOOD SURFACES
3.7.1
New [, Existing Uncoated,] [and] [Existing Coated] Plywood and Wood
Surfaces, Except Floors:
a.
Wood surfaces shall be cleaned of foreign matter.
Surface Cleaning: Surfaces shall be free from dust and other
deleterious substances and in a condition approved by the
Contracting Officer prior to receiving paint or other finish. Do
not use water to clean uncoated wood. [Scrape to remove loose
coatings. Lightly sand to roughen the entire area of previously
enamel-coated wood surfaces.]
[b.
Removal of Fungus and Mold: Wash existing coated surfaces with a
solution composed of 0.2 liter 3 ounces (2/3 cup) trisodium
phosphate, 0.1 liter 1 ounce (1/3 cup) household detergent, 1.6
liters 1 quart 5 percent sodium hypochlorite solution and 4.8
liters 3 quarts of warm water. Rinse thoroughly with fresh water.]
c.
Moisture content of the wood shall not exceed 12 percent as
measured by a moisture meter in accordance with ASTM D 4444,
Method A, unless otherwise authorized.
d.
Wood surfaces adjacent to surfaces to receive water-thinned paints
shall be primed and/or touched up before applying water-thinned
paints.
e.
Cracks and Nailheads: Set and putty stop nailheads and putty
cracks after the prime coat has dried.
f.
Cosmetic Repair of Minor Defects:
(1) Knots and Resinous Wood [and Fire, Smoke, Water, and Color
Marker Stained Existing Coated Surface]: Prior to application of
coating, cover knots and stains with two or more coats of
1.3-kg-cut 3-pound-cut shellac varnish, plasticized with 0.14
SECTION 09900
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