Do you have any experience with Concept 70 polyuerethane from PPG?
I've seen some gliders painted with it and they still look newly
finished 3-4 years later.

Paul Gaines wrote in message ...
For spray fillers (primer surfacer) we use Sikkens
Colorbuid. It is a 2 part polyurethane sytem that
you can have blended to whatever color you want. It
is high-build and sands relatively easily. I have
sections of this filler on raw fiberglass and gelcoat
that has been sitting outside full time for 3 years
with no visible degradation. For thicker filling we
use 3M polyester glazing putty.