There was some info about a year ago on RCU, and I printed it out in case I had an attack of CRS.....
You can get a very good catalyst for these paints from:
Norm Douthit Aero
167 W. 49th St.
San Bernardinao, CA 92407
888-811-2232 or 909-883-2232

The product is Epoxy Primer Catalyst, part # EP-430

I called them....very pleasant to work with.....and ordered a quart which I split with my buddy. I can report it works as well if not better than the original K&B or Hobby Poxy catalyst.

The gentleman posting this info also said that Sherwin-Williams Auto Acrylic Lacquer Reducer works fine for thinner.

So--there ya go!

Clair