Hi there

I'm relatively new to using composites and not familiar with the different types of resins available. I am looking to make fiber glass petrol tanks for competition motorcycles. There are a lot of people already using these on the Pre65 Trials circuit but in the last few years a lot of them have started to delaminate and bubble. Additionally the resin has been clogging up the carburettors. This is attributed to the Ethanol in modern fuels.

Is there a resin available that is resistant to ethanol even at the quantities used in E85 which has yet to reach our shores.

Many thanks

Steve

Personally I would look into making a custom bladder for the inside of the mold, like pretty much all fuel cells have.  That is what the ferrari F40 has.  It is safer solution than trying to do something that you think might work because some guy on the internet did it.