you cant gell over paint,but you can paint over gell.you need to gell a base,do your flake,then gell over that. I was reading your post above and it said you were going to paint over your repaired spots,thats why I said what i said above.
Oh, and good luck....
your garage will never be the same and good luck with trying to hide your gell odor,won't happen. You are however allowed to spray up to 1 gallon without the aqmd getting involved.Everytime we spray something here fire rolls up to try and put the stop to us spraying, but they let us finish what we are doing when they see what we are spaying.