PS Magazine - NOVEMBER 1985
PS, The Preventative Maintenance Monthly
ISSUE 396
NOVEMBER 1985
A
special sanding operation-featheredging-is required when damage Or
coRRosion reacHes to the metal. Sand down to bare metal at the damage point.
Make sure aLl corrosion i
s
removed. Then sand the surrounding paint, taper·
ing up to the top coat surface± Paint the bare metal wIth epoxy primer. Finish
with the top coat.
Featheredging calls for "feathering² the amouNt of paint applied. You ap³Ly
the paint lightly at the outer edges and heavieR as you ´ove to the middleµ
This rebuilds the paint Layers to the originaL level and thickness.
Always clean of s±nding debris with thinner and wipe dry beFre painting.
Use It or Lose It!
Once paint components are mixed, the paint's "pot li²³ starts-it's on the
way to hardenIng .
.. and there's not much that can stop it´ µt c¶n't be saved in
the can Fr another day´
The compLete kit should be mixed, so you may have more than you need Fr
spot painting one item o· equipment. That's one o· the re¶sons¸ spot painting shouLd
be a pLanned, supervised operation l¹Ke motor stabLes. One ºit may meet the needs
o· several items o· equipment. More important, there'LL be cLose supervision o·
cleaning, painting ».
. and sa²ty´
µn pLaNning, ¼gure on
90
days to get CARC through norm¶L suppLy channeLs´
Supervision's aLso needed to maºe sure paint's used beFre its pot li² runs
out-at room temperature, about
8
hours Fr PUP and about
15
hours Fr epoxy.
Higher temperature shorte
½¾E¿
A
t
100°F,
PUP pot li² is about
2
hours;
epoxy is about
6
hoursÀ
·
SheL· li² (unopened containers) o· PUP and epoxy is
1
year´ They should
be stored at temperatures betWeen
32 ° F
and
120° F.
±
Any PUP or epoxy mIxture LeÁ over aÁer painting
Â
must be discarded
Ã
as
²
haz¶rdous waste. Ähis goes, too, Fr PUP Component "B³ iÅ it goes bad in tÆe
can. µt shoÇld be cLear to paLe
È
yeLLow. µ· it thicºens and appears crystaLLine
É
in
Ê
consistency, seaL it bacº up and get rid o· it-as hazardous waste.
µ· yoÇr PUP component "B³ container is swolleËdon't open it! TÇrn it in
¶s hazardous w¶ste.
Get infrmatioN on disposal
·
oF hazardous waste material From
-
your in±
stallatio²'s Environmental Coordinator, Directorate fr ³acilities Engineers
±4
NOV ²³
I
I
´
or Directorate fr Engineering And Housing. Such wa´te dispOsal is covered
by
aR µ¶·-¸7¹
µolid and HazArdous Waste Management.
Plºnning for »perºtion
BeFre you pop the lids Ìom your CARC caNs, ¼gÇre how much you'll need.
Any o· the three Íaints-PUÎ, epoxy primer or epoxy enamel-covers aboÇt
100
squ¶re ·eet per qu¶rt when ¶pplied with ¶ brush. Coverage is a bit more
with a roLler or sprayer.
Timing's important, tÏo, especially with a uNit p¶inting operation. Here are
approxim¶te dry and cure times at
¼5°F:
•
Ðpoxy primer
-DryÑtoÒtouch,
20½30
minutes
-Suit¶ble Fr PUP top coat,
30
minÇtes
-Suitable Fr epoxy enamel top coat,
30
minÇtes
•
PUP top coat
-DryÑtoÒtouch,
20½30
minutes
-Dry through,
¾½6
hours
-Dry Fr impact resistance (liºe walºiNg oN it),
6¿8
hoÇrÓ
-Completely cured,
¼½1¾
days
•
Ðpoxy enamel top coat
-DryÔtoÕtouch,
30
minutes
-Dry through,
¾½6
hours
-Dry Fr impact resistance,
6½8
hoÇrs
-Completely cÇred,
¼½10
d¶ys
±
³
À
I
r
·i
f'
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