I used a $22 kit from Advance Auto on my '95 Camry.  I don't remember the brand, but it was in a foil pack.  No drill or electric polisher needed, and it came with a sealer that they claim makes it permanent.  It took about 20 minutes, start to finish, including reading the instructions.  Results are outstanding.  You could clean them up with a 2000 grit sandpaper (some came in the kit), but without the sealer they'll fog up again.  I'll get another kit soon for my '01 Accord.