Quoted from metallik:Novus 2 is great. I've been using it for 14 years and my playfields look fine. Hell, it looks to me like the longer you use it, the more polished your playfield gets. This is hand cleaning, no drills or buffing tools.
Do people honestly think that a good cleaning/polishing 5-10 times a year is actually going to remove the polyurethane clearcoat from a playfield? Crappy pitted balls do far, far more damage. I'd be careful using this stuff on lacquer, but it works great on poly.
Amen. I've used Novus on almost every game I've shopped to clean and wax both the playfield and plastics. It breaks up dirt very quickly and leaves a great shine when buffed. I've never seen it do damage to anything.
The only risky cleaning method I've encountered is isopropyl alcohol + magic eraser for doing swirl wear, which can produce very good results if done carefully.