Managed to try out my new-to-me sandblaster today. Took a bit to get it tuned just right, but it works awesome. Really fast removal of paint and rust. My compressor struggles to keep up with it, which I expected, but it still ran it. It did force me to stop after a bit because the air was getting moisture in it and the blaster doesn't feed well with any moisture in it.
Did manage to find some more pinholes in the inner arch. The last few inches of the rear I'll cut out and replace, but the other ones are small and few enough that I can't see justifying cutting them out. POR-15 makes a product called POR Patch that would be ideal. Or even just seam sealer or some panel bonding adhesive. It isn't structural or visible and the metal is clean on both sides, so it just needs to be sealed.
Did manage to find some more pinholes in the inner arch. The last few inches of the rear I'll cut out and replace, but the other ones are small and few enough that I can't see justifying cutting them out. POR-15 makes a product called POR Patch that would be ideal. Or even just seam sealer or some panel bonding adhesive. It isn't structural or visible and the metal is clean on both sides, so it just needs to be sealed.