I haven't and I won't.
The cloth has to have two qualities for consideration.
1.I has to be clean.
2.It has to have the proper binders for the resin you are using.
I don't know of any way of ascertaining that visually. I buy from a reputable source and trust that he won't endanger his reputation by selling unsuitable products.
Charlie

: Has anyone ever bought FG cloth on ebay?

:
: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4515112719&category=26455

: Just wondering if there's any experience out there.

: The item description says "silane treated" (?) but good for epoxy
: work?

: Any warning flags? I recall a photo of a large roll like in the link above on
: Ross Liedy's site, which he said he bought on ebay.