Thanks to all those who had helpful suggestions a while ago when I
was pleading for advice.
Here's what happened - I painted the racecar ('66 spridget) with 2
pack (Mercedes "Aqua Blue", similar to diamond white) and ended up
with some runs and some areas of powdery finish. The main reason for
my problems were that I sprayed at too high an air pressure. This gave
me very little tolerance on the right distance and timing.
If it was acrylic laquer, it wouldn't have been a problem, but with 2
pack it was a pain.
a) I had to sand back the rise of the run until it was flush with the
surrounding paint. I used a little 320 grit W&D, followed by 1200
W&D. It was a painful and slow process. Oh yeah, I had to use a hard
backing surface for the W&D. I used a piece of wood about 12" x 1/4" x
1/8" and used spray adhesive to attach the W&D.
b) I screwed this up in a few places and ended up respraying a
significant sized section each time. The ones I screwed up were
because either 1) while the outside of the paint was dry, the inside
of the run wasn't ("doh!") 2) I tried using the pneumatic orbital
sander to speed things up 3) I used the 320 grit for too long.
c) the finish of the sanded sections was more "satin" than "high
gloss" and required **LOTS** of buffing to get even close. While it is
nice that 2 pack cures to be glossy without buffing, unless you do it
perfectly it is a curse. Maybe I should have sprayed a clearcoat over
the lot...
Anyhow, its is done now and is a hard and resilient finish. If I did
it again (2 pack that is) I'd try a HVLP unit.
Mike
_______________________________________________________________________
Mike Gigante
3D interactive graphics, Virtual Reality, british sports cars, and wine
http://mega.cgl.rmit.edu.au/~mg/ mg@mega.cgl.rmit.edu.au
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