I use the PVA on small repairs and it works fine.
I used to do the mad scientist routine and I had problems. Now I follow directions, measure carefully. That way if I have a problem I can go back to the place I get my stuff from and get answers.
...and I know what your talking about when the stuff doesn't work <img src="http://www.catsailor.com/forums/images/graemlins/mad.gif" alt="" />
...and with painting you do most of your sanding up front and with Gel you do most of it after. There's no getting around it. <img src="http://www.catsailor.com/forums/images/graemlins/smirk.gif" alt="" />