I'm planning to repair and paint my tub. Overall, it's not in bad shape. Quarters, cowl, and floor are pretty solid. My plan of attack may be to sandblast, then spray entire tub with primer, then weld in homemade patches from flat stock. Where I'm uncertain is dealing with the support channels. I think the one closest to the rear of vehicle can be patched and fixed. The one in the middle of the tub is shot. I've seen replacements from different vendors but they're a little pricey. Couldn't I just bend up some flat stock to make a similar "C" channel of the correct thickness and weld in? You can also see some holes in the quarters where the wheelhouses attach. Not sure what the sandblasting will uncover in those areas. To fix that, I'm thinking about welding in smaller patches and using a light coat of filler.