Yes you can, but do you know how much clear is on there? You need AT LEAST three coats of clear as you'll lose AT LEAST one in color sanding. Most of the paint jobs you see don't have enough clear to avoid going through. When you do, it will show up, especially on metallics. I'd talk to whoever painted it, maybe even get them to do it as it's VERY time consuming, especially if there's bad orange-peel.
I usually start with 1000-1200 grit, finishing with 1500-2000 grit. I use the Finess-It III with a white foam pad, followed with 3M machine glaze and the black foam pad. I also have a commercial buffer. There are many mistakes that can be made if you aren't careful or don't know what you're doing. Sharp edges easily burn or sand through and should be avoided. Avoid high speeds, too much time in one area, too much pressure, etc. Talk to a local paint supply house and get their recommendations.
I just did a friend's Camaro and spent nearly 30 hours on sanding and buffing. It's a slow, careful process or you'll be re-painting the car.
Jody
