Slicksand with a shot of acetone per RTS quart gets my vote, no tackiness and the best of evercoat for sandability I think. I used G2 for quite awhile but it does sand harder than Slicksand IMO. I've used Morton, both versions of Featherfill, Z-chrome, Sikken's, and PPG's-they all work. There's still a lot to try: Standox-I seen an impressive sample of this years back but no local suppliers, transtar, Upol...