Hey guys, I'm stripping the undercoating in order to find and address hidden rust areas, and intend to paint it afterwords. This seems to be effective in new cars (my 2001 Silverado still seems clean underneath, a testament to the improvements in paint in the last 30 years) and this car will never see a winter road again, so I'm thinking paint should be sufficient. I have found a few areas with pinholes in the floorboards which I intend to reinforce with fiberglass (from the inside) after a thorough wire brushing down to bare metal. The front passenger side will be completely replaced with a toe panel from a donor car and a new patch floor panel. After this, the remaining rust areas will be treated with POR. Finally, I'm planning on coating the inside with spray-in bed liner material. As for the underside, after all this is done, what's the most durable (black) paint? Suggestions I've received so far were: Implement (tractor) paint Catalyzed acrylic urethane enamel basic lacquer rustoleum spray-in bedliner material (ugly but tough) What results have you guys had? Do you have a favorite? What other suggestions do you have?