I recently acquired a 90 SW. The truck is leaking in several places but was hard to trace given years of detritus so the shop asked that I degrease and pressure wash the bottom in prep to trace leaks and rebuild the axles. The process of removing 28 years of gunk also took a good portion of the rubberized undercoating. I now have a motley underside of this rubberized coating. In full disclosure I probably could have gone easier with the degreasing/washing. I'm concerned I created a bigger issue by trying to clean up the truck. What's the best way to reapply some rust protection? Do I need to strip the whole thing now that I've removed certain portions? The neurotic in me says I've opened pandoras box and worried about the repercussions.