Has anyone used the 2-part urethane POR-15 paint for their interior? It cures rock-hard (used by a lot of car restorers for underside of cars that get pummeled by dirt and gravel), can be applied over a variety of primers or to acid-etched bare aluminum, and is available in a variety of colors. I will be installing a trim kit from FlightLine that will cover most of the interior structure on my RV-12iS, but am looking for something durable to apply underneath, especially on the floors. Note, this is different from POR-15’s more commonly used DTM Top Coat. Thanks, all.