Paul wrote "1. In several locations on my powdercoated white inner sills
(TR3) are tiny,
tiny rust spots. Only about the diameter of the SHARP end of a
threaded-needle
and say one spot for every square inch (in places). These uninstalled new
sills had been set outside in the weather for 6-12 months. Had they not
been
powdercoated a bright white, these tiny dots would never have been noticed.
The location of the dots are say, at the small ledge which holds the
floorpan. And actually, hardly are present but on one of the sills. At some
point in the past, I chose to ignore them and just paint over them with clear
colored Por-15. Should I worry about it? "
I would be careful here. Your right, white will show rust break (if it
really is rust) thru much easier than any other color. Although the spots are
tiny now, they will only become bigger over time. If it is rust you should go
back to the PC shop & ask them to fix it. Sometimes items are left around
too long in the shop after sand blasting & before powder. Without a phosphate
treatment, rust starts almost right away. Even if you cannot see it, it's
starting.
But maybe it is not rust? White powder can discolor faster than any
other color powder if over cured slightly. Or better yet, maybe the shop shot
a
reddish color before your white parts & the gun was not cleaned out god enough
& you are seeing specs of the other color?
If it is rust, MAKE THEM FIX IT!. If it is over cured or other color
specs. No big deal. If the shop will not help you, do your best to remove the
rust or use an rust encapsulater & then paint over it.
Date: Sat, 27 Jan 2007 22:14:23 -0500
From: "Paul Dorsey" <dorpaul@negia.net>
Subject: [TR] Powdercoating? P.S. I forgot this-
P.S.
I did a variation of the 20 swipes of a solvent rag(MEK or Acetone) test.
And
found the clean t-shirt to be only slightly dingy colored regardless of
wheter
it was done on the white or black powdercoating. The person who suggested
this said that if the rag was disclored, then, the powdercoating might not
have sufficiently liquidfied prior to drying. Right?
That was me. No the rag is not the area of concern. If the powdered
items finish did not discolor or loose it's sheen. The powder was cured
correctly.
Perhaps my test was faulty as the only solvent I had was a 'solvent cleaner'
called Klix put out by Acme Automotive Finishes. Ingrediants were: V.M. & P.
Naphatha, Mineral Spirits, Toluene and Dipentene
I WONDER IF THIS DID THE TRICK?
Sounds like it worked
Good Luck
Bob
_www.capecodpowdercoating.com_ (http://www.capecodpowdercoating.com)
_www.capecodbritishcarclub.org_ (http://www.capecodbritishcarclub.org) .
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