Interestingly enough I just did mine this weekend. I bought the $19 3M kit at W*M followed the directions and was done in under 15min. They have you work through 3 grits of sanding then buff with compound. If you already have a drill you are pretty well set. 300 grit followed by 800 grit then a VERY fine almost like modelling clay grit sponge wet, follow up with the compound. That super fine sponge thing is important or you will be buffing for quite some time I expect.
There is enough material for better than 5 vehicles if you are a bit frugal, and not all are in horrible shape. The small disc is nice for working in the small confines. Make sure you use the mask around any paint cause the disk will jump around on occasion.
