I have some light rust that I'd like to tackle myself around the windshield from a bad install. It's light scale and it's been treated. No holes to contend with. I'd like to sand, treat, prime and repaint the a pillars, and scuff, prime and paint the roof while at it. local body guys around here suck and I’ve always found i can do a better job. I know the rattle can won’t hold up like catalyst paint, i was thinking of clear coating it with 2k catalyzed rattle can clear. Any thoughts?