Well, I talked to gas tank mfr. These are the big buried tanks used at gas stations. He said they were using a "isophalic resin" a "1-2 iso". That make any sense to you guys? He also said that they were not applying any coating to their tanks.

I have a fiberglass tank in my Activator. The aluminum was a problem.

Do you know who built it?

but those things stay still, there not beat around like our boats are.