TO 35-1-3 - Robins Air Force Base
TO 35-1-3 - Robins Air Force Base
TO 35-1-3 - Robins Air Force Base
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<strong>TO</strong> <strong>35</strong>-1-3<br />
87937, Type I), which contain solvent. In either case,<br />
it is absolutely necessary that the surface be scrubbed<br />
while the soap is being applied. A clean water break<br />
free surface is necessary prior to additional treatment.<br />
5.6.1.1 Preferably on the day prior to painting, the surface to<br />
be coated the next day is to be cleaned. Use aircraft cleaning<br />
soap, MIL-PRF-87937, or MIL-C-43616, as appropriate.<br />
Always clean from the bottom to the top to prevent streaking<br />
and have one person applying rinse water to previously<br />
cleaned surfaces to also prevent streaking.<br />
5.6.1.2 Early on the second day, apply one coat of MIL-PRF-<br />
23377, Type I, Class 2, or MIL-DTL-53022, Type II (Lead and<br />
Chromate Free Epoxy Primer) primer to a dry film thickness<br />
of 0.6 to 1.1 mils. Drying time should be from one to two<br />
hours.<br />
5.6.1.3 Apply two thin coats of polyurethane MIL-PRF-<br />
85285 (total dry film thickness of 1.6 to 2.4 mils).<br />
5.6.1.4 After the first topcoat has been allowed to dry a maximum<br />
of 4-6 hours, apply the desired camouflage pattern. If<br />
using polyurethane, lightly scuff sand the area to be overcoated,<br />
then solvent wipe with Acetone, O-A-51, ASTM<br />
D329, prior to painting.<br />
5.7 GALVANIZED SURFACES.<br />
NOTE<br />
To prevent streaking and other problems, it is necessary<br />
to work from the bottom to the top and not allow<br />
previously worked surfaces to dry. The amount of<br />
surface area to be worked at any time should not<br />
exceed the surface area that can be zinc conversion<br />
coated epoxy primed and polyurethane topcoated in<br />
one day.<br />
5.7.1 Roof. Drape a barrier of paint drop cloths, barrier<br />
paper or other suitable material on the walls directly below<br />
area of roof to be worked. The drape should be such to prevent<br />
fluids from contacting the wall.<br />
NOTE<br />
Examine the galvanized surface prior to cleaning. If<br />
the surface appears to be dirty (not oily), then MIL-<br />
PRF-87937, Type IV soap should be sufficient to<br />
clean the surface. If the surface is oily, it will be<br />
necessary to use one of the soaps (MIL-C-43616,<br />
Type II or MIL-PRF-87937, Type I), which contain<br />
solvent. In either case, it is absolutely necessary that<br />
the surface be scrubbed while then soap is being applied.<br />
A clean water break free surface is necessary<br />
prior to additional treatment.<br />
5.7.1.1 On the day prior to painting, the surface to be coated<br />
the next day is to be cleaned. Use aircraft cleaning soap MIL-<br />
PRF-87937 as appropriate. Always clean from the bottom to<br />
the top to prevent streaking and have one person applying<br />
rinse water to previously clean surfaces to also prevent streaking.<br />
5.7.1.2 Early on the second day, apply the pretreatment compound.<br />
Again work from bottom to top applying the compound.<br />
Keep lower surfaces (even where the pretreatment<br />
compound was previously applied) flooded with water to prevent<br />
streaking.<br />
5.7.1.3 As soon as the pretreatment compound has dried,<br />
apply one coat of organic zinc-rich primer to a dry film thickness<br />
of 2.0 to 3.0 mils.<br />
5.7.1.4 Apply one heavy coat of polyurethane MIL-PRF-<br />
85285 (dry film thickness of 1.6 to 2.4 mils).<br />
5.7.1.5 After the entire roof has been topcoated and allowed<br />
to dry a maximum of 4-6 hours, apply the desired camouflage<br />
pattern. If using polyurethane, lightly scuff sand the area to be<br />
overcoated, then wipe with a scotch-brite pad, A-A-58054,<br />
Type I, Grade A, dampened with MIL-PRF-87937 diluted per<br />
manufacturer's instructions. After wiping with cleaner, rinse<br />
surface with clean cloth dampened with water and dry with<br />
clean cloth prior to painting.<br />
5.7.2 Walls and Doors. The walls should be worked only<br />
after the roof painting is complete. Work on the door can be<br />
accomplished as desired. The air intake space in the wall<br />
formed by the screen wire and acoustical panels must be protected<br />
during repainting operations to prevent entry of chemicals<br />
and paints. Cut pieces of plywood (or other barrier type<br />
materials) and push the plywood against the screen wire from<br />
the interior side. Because of the difficulty in cleaning and<br />
painting the solid wall area formed by acoustical panels and<br />
screen wire, it is recommended that a galvanized panel equal<br />
in width and length be fabricated and attached to the solid wall<br />
areas by means of locally fabricated standoffs.<br />
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