That I don't know, so you'll have to talk to a good paint shop to see what the options are. The most thorough approach, where they can control all the variables and take care of any underlying defects, is to strip the car down to bare metal, reprime, paint x 3 (or more), then clear coat, you get the idea. Then again, all that may not be necessary, or maybe just for the hood. Best to talk to a few good shops, get some prices, and decide from there.