Oxy eats ASM/CPC chips (see story below). It is great on Paulsons. Avoid water that is too hot as some colors can fade. Oiling the chips helps bring the color back... mostly.
This is the method I used (on Paulsons) prior to getting an ultrasonic.
The story:
Back around 2013, I was cleaning my recently acquired Binion's Horseshoe chips. They were dirty and a mix of hat and cane molds and horseshu molds. It didn't occur to me at the time that the horseshu molds could have been manufactured by someone other than Paulson. Well, the first couple horseshu mold $1 chips I started to clean started melting in my hand. I looked like I was cleaning a paint brush after painting a tan room. I quickly rinsed the chips. The chip now has a somewhat pummice like appearance. Porous ya know... good times.
I have since discovered that TRK Large crowns don't like oxy either... small crowns are just fine. I think I recall hearing that the large crowns were actually manufactured by Burt Co. The horseshu molds are also Burt. FYI, Burt Co became ASM which became CPC... so likely same formula throughout.