Skip,
Go ask Kevin Tetz at www.paintucation.com, one canuk to another. Kevin grew up over in Oliver BC, now residing in Pulasky Tn. In one of his videos he talks about this sticky filler phenom.....

The other spot would be the guys at www.autobodystore.com message board.

Love your analysis about a freighter full of the stuff would set up like a rock by morning but let me get just a teany little bit to do this one spot??? Murphy and all his laws.HA!!!!

Cheers.....