there are several posts about chip cleaning services, in the casino industry. As I recall, there was an Indian casino that washed their chips so much, they faded. Moreover, I have seen chip cleaning machine vendors at G2E (probably about 5 years ago) and also received "chip cleaner" solution samples. Which, by the way, does a really good job, even when diluted with water!

In your search, should you choose to look, key words are John Zoesch and myself.

Jim