How did those prime Europa airframe with PPG primer?
What was post cure time and sandpaper used after fill?
What PPG primer?
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PPG literature states that DPLF Epoxy Primer and K-36 can be applied over
fiberglass.
After talking to technical support, their stance is "fiberglass", means
fiberglass with gel coat on it. They do not support apply of their primers
over raw fiberglass.
She said that if you apply K-36 over raw fiberglass, there is a good
chance that seep in will cause problems.
Unofficial from PPG, a good starting point would be to apply DPLF Epoxy
primer at least 1.2 to 1.5 mil thick, wait 4 or 5 days, sand then apply
K-36.
An Autobody guy said he puts a thin coat of DPLF on Corvettes he works on,
then lets cure for 1 day, then applies K-36 over DPLF without sanding.
I plan to fill with Aeropoxy and Expancel, and top coat with PPG DCC.
Ron Parigoris
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