Restoring paint color tips?

I use 3m super duty rubbing compound... and as was stated before, watch edges and ridges.... something ti think about.... all the time you saved using a machine will be spent repairing the spots you burned through. Been there, done that... as was also stated before, practice on an old panel of something.... putting 2 thicknesses of masking tape on edges helps, we always did that at the body shop....

Oh, and welcome to the site!