True, but I still would line it. I am pretty sure he is using West Systems resin. Like I said earlier, in the research I did for my build that resin will last for a while, but over time will still soften due to the ethanol. The only epoxy I read about that will resist it long term is Phenol Novalac, which is the epoxy used in Caswell's.That particular article refers to "Polyester resins," which are clearly non-starters. Epoxy resins come in many variations. Some are impervious to alcohol. The actual fabric is not bothered. It is the resin that fails.
I don't know about you, but if I put this much work into a project of this magnitude I wouldn't take any chances. It would be $50 well spent in my book.