The picture below shows the various Novus cleaners I use for both EM and especially Electronic games for cleaning the playfield surface and plastics. For a really dirty playfield I use Novus #3, and for a not so dirty surface I use Novus #2. I clean all plastics with Novus #1 and likewise for general maintenance cleaning. Some folks use Carnuba wax on the playfield but I just use Novus #1.
(click any picture to enlarge)