I did some research into these, and I decided not to. I've read a few times about how the acid getting into seams, but not being given enough time to seep out, and rusting them inside out. I also read up on soda blasting leaving an alkili residue of a higher ph than original, causing problems for metal and paint reactions. I read grit blasting can be best, but can distort panels if not done properly, so is commonly used for small tight to access areas like roof gutters, and underside floor pans.