I am replacing the fenders in the next month. Since I am doing all the rest of the work on my car, I thought I would try to paint it as well. The worst that can happen is I have to strip down and have someone fix my work. I am planning on using Centari or its equivalent. What all do I need to buy from the supply house to do the job. I figured a gallon of paint will leave me with some "touch-up" reserve. Should I use a hardener? I have never painted before and think that a fender on a saw horse is a good place to start.