ORIGINAL: bkdavy
Any actual experience with either of these? Perhaps its time to conduct some experiments in "the lab," otherwise known as my basement workshop!
Go for it. If I actually need to thin epoxy I use one of the two I mentioned. They're easily available and I keep a can of each in the shop for other uses. I've found serveral studies online showing the results of thinning epoxy. The conclusions were that thinning weakens the epoxy, but for fuel proofing, that's not a problem.