I prefer to replace what is needed. Then have the car stripped in a non corrosive bath. Read: no acid. Then ecoat the whole thing. The Daytona I am doing is in the projects section, hole in my foot Daytona, and I just posted some pictures from the process if you like to see what is involved. No other way to do it if you have a car you feel deserves it. The only reason I say that is it is somewhat expensive. When you put pen to paper for a comparison to blasting and the headaches involved there it is worth it.