Where did you find the Tuff 2 ? At least online I can't locate at Home Depot or Lowes, possibly it's just not listed... seems like there's a few marine place online that carry it. On fire proofing, did you treat the bare foam first on top of doing the paint additive? I believe this is what is recommeded. I'll post some test results of hardcoating, I might try Senergy and add Acryl 60 or bonding agent...supposedly it chips easily accordingly to LarryK experiences at The Darkness....so thinking maybe experiementing with mixing additives to it.