Word of caution painting over the SW primer that the QB comes with, I used this exact stuff, P60 G2 something something and vans confirms its the same as the QB, the can says to topcoat within 4 hrs. I found that this stuff gets very hard and slick, and I topcoated months later and guess what....I just got done stripping all my interior...what a mess. I suppose if you dont mind redoing the paint down the road I could have left it but I want something that I am not compromising with right off the start. I am not sure what you could do except wipe it off with acetone and start over with the prep and paint process to insure as good adhesion as possible. Scuffing this stuff seems not so good. I sure wish I had just used zinc chromate/oxide as anything I had that one stuck just fine.
anyway my 2 cents
still figuring my next move on painting my own interior.