The spray is awesome, much better than the brush. I'd knock of the loose stuff and file/sand the edges smooth and tape it off with as little overlap as possible to the original paint. Then spray down 5 layers or more of paint - it sounds like a lot - but the spray was really lightweight and dried within 15 minutes when I used it (billet). I ended up using two cans on the work I was doing, when I expected to barely use one - if you order the spray from Quadratec you may want to order multiple cans so you have extra on hand for later. I'd expect to use 1/2 can on that by the time I was done.
I was impressed at how well the spray blends and matches, much better than the brush on touch up paint.
2013 JKU Sport, billet, auto, 3.73, LSD, 315/75/16 Duratracs on MB 72, 10A springs, Bushwacker flatties
Sold - 2005 TJ, red, auto, 3.73, 33" Duratracs, 4" lift
Ice storm casualty in 2007 - 2003 TJ, green, auto, 3.73, 33" Duratracs, 4" lift