I use SPI primers and clear coats in my restoration shop. About a week and a half ago I mixed about 30 ounces of SPI epoxy gray. It has a minimum half hour induction time prior to application. A lot of SPI users will induce this stuff up to 48-72 hours prior to use to increase viscosity which results in higher film build. (I will restrain from spinning off into a lengthy discussion on this that's better suited for a restoration topic)
I mixed my primer too soon, it had been inducing for like 4 or 5 days and was becoming too thick, so rather than throw it away I grabbed a paint brush and coated the whole floor on the old truck.
Epoxy is the-chit for locking out water. But the very best would be to use both, my epoxy topped with your bedliner. The bedliner gives the abrasion protection and with the epoxy under it, well you just couldn't beat that combo.
