- Location
- Rainy side of Washington
My frames have always rusted out from the inside instead of from the outside, so I don't really put much stock in undercoating. Proper frame rail drainage, not making the frame rails out of spot welded sheetmetal lasagna, and proper anticorrosive and waterproofing coatings on the inside of the frame are where you can really improve things... sadly a few of these are something that can really only be done at the factory.