Well I guess I'll try it although I don't see how it is possible to have amine blush or any surface contamination. As I said I'm using MAS with slow hardener and scrubbing it down good with denatured alcohol before I start. Also, I had the same problem, though not quite as bad, with the first coat, which was over bare wood that had also been cleaned with alcohol.
I'll sand her down pretty smooth and not worry about sanding through to wood here and there. I happen to have some Interlux YMA601V Fiberglass Surface Prep which I purchased by mistake but they won't allow me to return. It is for removing all contaminants and amine blush. So maybe it's a good thing I have it. Or I could use MEK, but it seems to me the YMA601V might be exactly the right thing.