Lots of information on this site with recommendations. Personally, I start with magic eraser and denatured alcohol. Scrub small area and immediately wipe off with paper towel. When I have done the whole playfield I polish with Novus #2. Finally a coat of pure carnauba wax.

When using the Magic Eraser, use light pressure or just drag it along on the playfield. You are not trying to remove rust off of a chrome pinball leg.

In my experience I use quite a bit of pressure and change of motion....circular and back and forth....whatever it takes to remove the dirt and ball swirl marks. I dip the magic eraser in a dish of alcohol and scrub an area for about 10 seconds until it cleans up, then wipe off the mess before the alcohol dries. When it dries it will have a white powdery look, but will shine up nicely with the Novus #2. Quite effective and I've never found it harmful to the playfields I have done.

Alcohol may dissolve whatever lacquer coating is still there. Test under the apron.

Depends on what your plans are. If you are going to clear coat it, go nuts with the magic eraser. Otherwise be cautious.

I try to use the least aggressive method necessary to get it clean. My method would be to start with naphtha and see what it removes. If not enough, move on to Novus 2. That was all it took for my Travel Time. Big hit needed more, so I went at it fairly aggressively with magic eraser. After ME, I go back to Novus 2 to shine it up. Last step is always carnauba wax.

What I have gleaned from Vid's guides, and it works for me:

1) vacuum the dust and dirt off. You'd be surprised.

2) naphtha with a soft cloth until clean. Stop if you get color on the rag.

3) wax.

https://pinside.com/pinball/forum/topic/cleaning-and-waxing-pinball-machines-vids-guide