Epoxy Primer -
Body tub off frame took ~7/8 of 2 gallons of epoxy primer (inside/out and top/bottom including roll bar, engine compartment, and wheel wells. The tub was completely sand blasted. The primer needs to be direct over metal type.
Raptor Liner -
I sprayed the body tub underneath and sides with lower quarter panels off. This includes the front fender skirts, door posts, and wheel wells (no interior and no engine compartment). It took 7 liter bottles of Raptor liner. Only one good coat was applied with occasional touch up. I also added ceramic beads for insulation as mentioned in the other posts.