Williams recommends using Novus #1 and Novus #2 on their Diamond Plate(tm)
playfields. Novus also works wonderfully for cleaning, polishing, and
removing scratches from all plastic components. Older non-Diamond Plate
games can be cleaned and polished with Wildcat #125, Millwax, CP-100, or
even Novus. Be aware that CP-100 and Novus mostly polish and leave little
or no protective coating for the older games. Do not use waxes on clear
plastic ramps because this will dull them. However, this dulling can be
repaired/removed by Novus.