Mike Spera wrote:

Jay,


Not sure I have ever heard of fiberglass that was not fuel resistant.
Most glass resins I have ever heard of are polyester based and
definitely hold up against most fuels (chemists please feel free to
chime in).

Polyester resin can not be used with fuels. The wing skins of
my Aerocomp are made with polyester resin. The wet portions
of the wing are exposed to fuel and have to be coverd with
fiberglass mat and vinylesther resin.