I'm sure Paul Oman will chime in here, and though I find his web-site
(www.epoxyproducts.com) difficult to navigate, the prices for their
'Basic No-Blush 2 Epoxy' and 'Premium No-Blush Epoxy' - both with a
mixed viscosity of 600 cps, neither of which I have used are
considerably cheaper than $60/gal in the 15+ gallon quantities.

There are now '.pdf' data sheets on the site, which include a good
ammount of technical data.

Possibly worth a look.

Mike Worrall
Los Angeles