I've got a question for all of you paint experts.

First off...a little history on my skills. I'm a newbie when it comes to auto painting. I took a 14 week auto paint class and have since painted 2 cars and several "parts" for people...all of which turned out good and have held up fine over the past year or so.

Last summer I (and my father) painted a hood for a guy here at work. The clearcoat was flaking off really bad and he asked me if I could fix it for him.

I thought..."how hard can it be. Sand it down, repaint it and clear it...piece of cake."

Well...within the past couple of months there are little small (1/8") dots of paint popping off in numerous places on the hood down to the primer.

Here's what we did...
I sanded the hood down through most of the clearcoat...down to bare metal along the outer sides of the hood where most of the "flaking" was occuring. I used Krylon can auto primer and immediately followed it with DuPont Chromabase 2-stage paint and clearcoat, followed by wet-sanding and buffing.

What could I have done wrong?...bad paint?...something on the hood that I didn't get off completely? Anyone have any ideas? I do remember my dad wiping it with "Cinch" window cleaner as we were wet sanding...could that be it?

I wonder how hard it is going to be to redo...will I need to strip it down to bare metal and start from scratch?