Everyone in the rust belts should be putting fluid film/woolwax/krown under their vehicles. I think decades of shady "rust proofing" sprayers that were either

Everyone in the rust belts should be putting fluid film/woolwax/krown under their vehicles. I think decades of shady "rust proofing" sprayers that were either a scam or did more harm than good (plastic/rubber under coatings) have put people off of doing this but there are products now that work well.