PS Magazine - TB 43-PS-598
PS, The Preventative Maintenance Monthly
ISSUE 598
SEPTEMBER 2002
M
O
R
E
Paint Removal
Even with the best precautions, there
will be times you’ll need to remove
CARC from a surface that can’t be
scratched or scored—like hydraulic
cylinders, cannon mounts, and aircraft
surfaces. You won’t be able to grind or
sandblast without damaging the equip-
ment.
Use epoxy and polyurethane paint
stripper to remove CARC in sensitive
areas. Wear the gloves and respirator
recommended by your occupational
health and safety office.
Get the stripper with these NSNs:
Paint Failures
PS 598
SEP 02
54
Plan Your Painting
If possible, paint your equipment when the
outside temperature is between 60° and 100°F.
The ideal temperature is 75-80°F with a
humidity of 45-50 percent. CARC will still
cure at temperatures below 50°F, but it takes
much longer.
Spot paint your equipment in the shade or on
an overcast day. Never paint in direct sunlight
or when the surface temperature of your equip-
ment is over 100°F. The solvents in the paint
evaporate too fast and the CARC won’t stick.
Step-by-Step Touchup
Now you’re ready to spot paint your equipment. Follow these steps:
1.
Follow the directions that come with the primer to mix only as much as you’ll
need for that day. Remember, you’ll have to dispose of any extra primer because it
hardens quickly and can’t be reused.
2.
When the mixture is uniform, let the
primer stand for 30 minutes, then brush it
on. Make sure you feather the primer
over the edge of the old paint. The primer
will harden within 30 to 90 minutes.
3.
Stir the container of CARC topcoat
thoroughly, then brush it on. Any regular
paint brush will do, but here are a few in
various sizes:
Paint
during this
temperature
range
FC
120
100
80
60
40
20
0
50
40
30
20
10
0
-10
Brush on primer,
then topcoat
w After application, CARC goes through a
drying process in which the solvent evapo-
rates and the film hardens. Usually the topcoat
will be dry to the touch in about 30 minutes
and dry enough to walk on in 4-6 hours.
Complete curing takes considerably longer,
however. At room temperature (approximate-
ly 72°F), it will take 7-14 days for the CARC
to completely cure. Cooler temperatures
require longer cure times while warmer tem-
peratures require shorter cure times. Do not
use the equipment until you’re sure the paint
is completely cured.
NSN
8020-00-
263-3866
559-9842
205-6501
263-3867
559-9843
597-4764
Bristle Width
(inches)
1
1
1
∕
2
2
2
1
∕
2
2
1
∕
2
3
Bristle Length
(inches)
2
2
1
∕
2
2
13
∕
16
2
1
∕
2
3
3
1
∕
4
Apply the paint
lightly at the
outer edges and
heavier as you
move to the middle.
That rebuilds the
paint layers to the
original thickness.
NSN
8010-00-
142-9273
181-7568
Qty
1-pt
1-gal
NSN
8010-00-
926-1488
926-1489
Qty
5-gal
55-gal
The surface was not properly pre-
pared. Loose or blistered paint, sanding
dust, grease or oil, diesel fuel and even
fingerprints are enough to keep CARC
from sticking to the surface.
No primer was used. The topcoat
was applied to bare metal.
The primer did not have time to dry
before the topcoat was applied.
The surface was too hot or cold and
the paint didn’t have a chance to cure
properly.
If the CARC does not adhere to the
surface, your only choice is to strip the
spot down to bare metal and start over.
Be careful where you use the strip-
per, though. It can damage non-metal
surfaces such as plastic and rubber.
Occasionally, the CARC will not
properly adhere to the surface you’re
painting.
Here are some of the causes…
not my
face!
why
isn’t this
paint
workin’
right?
you have to
treat us as
hazardous
waste.
Follow
your unit’s
SOP for
proper
disposal.
SEP 02
55
Brush on primer, then topcoat
Topcoat
Primer
Bare Metal
598. 54-55 (C)
8/1/02
2:37 PM
Page 1
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