I have a question regarding epoxy.

I am 90% completed with my GP SuperSportster MKII and one of the final steps says to epoxy the inside of the fuel tank area... but now that I am 99% complete it would be next to impossible to get a brush in there.

My question is - is there a way to 'thin' down some 30 min epoxy with say.. some denatured alcohol? Just to get it to 'flow' around the chamber?

Oh.. another epoxy related question:
My trainer plane popped the cork on the fuel cell and now the inside of my Avistar has some fuel in it. I wiped it out and poured alcohol inside the fuse, but I am concerned about damage to the balsa. What can I do to 'fix' it? Should I coat the inside of the fuse with epoxy?

Thanks,
Ted