"RST Engineering" writes:

So where do you get the stuff? I've not yet seen it on my favorite Q-Club
shelves. Somebody also said that it is pricey. What is the magnitude of
"pricey".

http://www.mentormall.cc/getItems.cfm?currVendorID=434
says $18.67 + S&H for 1 gallon. Pretty reasonable compared to what
I've been using, Tomar TR-1000. Though the latter is so effective
it's worth the price. If ESG comes fairly close in effectiveness to
TR-1000 I'll switch. I sent an email to Aviation Consumer about ESG;
they hadn't heard of it, so perhaps they'll do a review. They
reviewed TR-1000 and recommended it.