Quoted from wayout440:FWIW, Bally manuals say "never use water in large quantities" ...note the term "large". There is no reason that you can't wipe down a playfield with a slightly damp rag...just don't get crazy with a sopping wet towel.
They also recommend Wildcat #125.
Stern recommends Novus for waxing and it's not even a wax, I don't know an old manual is the most trustworthy maintenance guide.