Here's some good surfing:
http://www.safety-kleen.com/products...nt-chemistries
The one concern I have with Simple Green (and I use it a lot) is it caustic so it will discolor bare, anodized, and clear coated aluminum if the concentrate is to too strong or contact time too long.
They have evolved into a relatively large chemical company and have an industrial line:
http://industrial.simplegreen.com/