I just tried ME + naphtha on my Space Invaders and the results are better than anything I've ever achieved with ME + alcohol. Not perfect, but it removed so much dirt out of the ball swirls that the colors actually look brighter & more vibrant. Not having to worry about the naphtha softening the topcoat & ink like alcohol will is a big plus, you just have to make sure to keep the area wet enough because the naphtha evaporates very quickly.

Vid, what are your thoughts on cleaning with ME + naphtha, especially on an older pf like an early Bally SS?

Boy oh boy, am I really REALLY glad that I didn't attempt to clean with ME + alcohol. I just tried a little alcohol on a rag to clean a few spots under a plastic that the naphtha wouldn't budge, and it softened the topcoat like a warm knife on butter. I can imagine how much damage would have been done had I started right in with ME + alcohol in a conspicuous spot.

I worked in a screen printing department in the late 90's, used to wash the ink off the screens, and then wash my hands, with benzene, xylene, xylol, lacquer thinner, anything we had around. I'm a ticking cancer time bomb.

I ordered some Collinite a year ago after reading some recommendations. Was hoping it would work better than either alcohol or naphtha for playfield deep-cleaning. I can tell you, and this is only my own experience of course, that a) it did nothing as far as cleaning dirt out of ball swirls, and b) when I tried it on a dirty area of the cabinet, it actually started taking paint off.

Per Collinite's website, and the very specific name of the product, Collinite #840 is a pre-wax cleaner, not a wax:

"Mild-cut pre-wax cleaner safely removes brake dust, film, light oxidation, oil, bird droppings, water spots, and tough stains from exterior automotive finishes. Restores original color and gloss and facilitates the easy application of Collinite’s last step waxes (845, 476, 915); improving wax bond, spread coverage and durability."

Whatever the case, it didn't work well as a cleaner anyway.