seadrive / Inverted 1: NeoTac Khameleon is a less abrasive version of Liquid Sandpaper. When I first used it, I too was concerned about altering the cover, and limited it's use to my aggressive particles and reactives.

I've since used it on my Pearls and other shiny equipment. When applied by hand, you really can't apply enough pressure to change a shiny surface. In a few cases, I've used NeoTac Renew-It to touch up the shine. Even when using a straight liquid ball cleaner, you need to apply polish occasionally anyway.

I don't use Khameleon for every cleaning. After bowling. I'll hit each ball used with 409 or Liquid Nitro, and call it a night. However, there seems to be a suggestion in this thread that Simple Green is all that's necessary for on-going ball maintenance. Try Khameleon after a a complete cleaning with Simple Green, and you'll quickly see the difference.
--------------------
"You want the truth? -- You can't handle the truth! "

Never thought about using Simple Green on bowling balls. Cleans alot of other things, so why not. I did check and it is OK by ABC guidelines. If using any cleaner, not marked with the approved logo you could find your balls tossed out during a tournament. I know I would if someone brought in a home mixture. Someone here mentioned a 99% alchohol. Many alchohol products are a no-no per ABC, so your stuff could get your balls tossed from competition. Someone mentioned an Armor-All sized bottle, but just for sake of mentioning it here, Armor-All is on the big never use list, right along with denatured alchohol, MEK and such. There was a comment about Isopropyl Achohol not having cleaning properties, we use it in our lab to clean off silicone and urethane sealants. Something, MEK can even have a hard time doing. I have also used it to wash off paint overspray. It can clean, so mixing with Green makes some since and it evaporated very fast which could be a good thing. If not sure about if a cleaner is legal, you can track the list down on BOWL.com under the rules sections.