Is there any evidence that motor gas will affect the fibre-glass fuel tanks
++++++++++++++++++++++ I would be very happy to see a comprehensive answer to this question. I recall when Safe-T-poxy first came out - word was that it was bullet proof for auto or avgas fuel tanks. Not sure how many tanks were built with this epoxy, but a few years later the story changed. New word was that it could be dissolved by some fuels. At least one unscheduled landing resulted from a gummed up pickup. More recently the word is that a potential alcohol content (methanol?) in some car fuel may cause problems. In southern Africa we have been exposed to fuels (Auto) of various alcohol content for maybe 25 years now, so we understand this snag. I remember reading about a "slosh compound" for the Pipers with metal tanks - a liquid that could be applied in the field, to form a fuel proof skin on the inside of the tank. The idea was probably to cure Cherokee's et al with weeping or leaking fuel tanks, but this may be the answer to isolating the epoxy tank from the fuel. It is a certified (approved) product for the purpose of sealing aircraft fuel tanks. Maybe a manufacturer /supplier should provide us with the poop - no big deal if brand X is not suitable for fuel tanks - just better that we know. Steve J