...spray filler....

golly I have no idea if this is the stuff we used in the shop a few months ago. But we painted a carbon fibre race car and had to give it a coat of this real real real thick primer (and I mean real thick). The trick was you need a 3.0 tip on your gun (huge I know).

...but then again, this might not be the stuff your talking about at all....

Good Luck