I have a 1983 Porsche 944 (red) with faded paint. I've been reading and reading and decided to try my hand at using the PC. I used a Porter Cable 7336 with a yellow pad and SMR. I think that would be considered playing it on the safe side. I did half the hood and I can't believe how the finish changed. I am approaching this correctly? I just feel a little unsure of myself at the moment. Thanks for all your help and many enjoyable hours of reading.