On the subject of fuel tanks and resins Lancair use the vinyl-ester resin in the construction of their tanks, but in an application where you are likely to be laying up over the foam, the vinyl-ester resin will dissolve it. There are quite literally 1000's of the Rutan style aircraft and others flying with epoxy resin tanks with no record of leakage, seepage or failure. The "sloshing" compound can be used, but there has been a number of instances where it has begun to peel and block the fuel systems and as such, Vans aircraft no longer recommend it for use in the RV's. I'll see if I can find a more comprehensive description of the issue.
Cheers, Peter Bancks. stranged...@dodo.com.au
