👆This. It’s not going to affect this particular bike’s value too much in either direction. If you think the paint prep is worth the effort then go for it!
From a practical standpoint, you might want to consider at least cleaning up any exposed steel and applying a little clear coat.
I too have shit roads around me. Full of potholes, littered with broken glass and goats head thorns. Flats were a way of life. When building a new set of rims last year I decided to try tubeless. The set up is a pain, but I havent gotten a flat since and I have pulled thorns, staples, and glass out of my tires and watched it seal itself right up with only a couple of psi lost. Side benefit is that I can run a lower psi too so it’s a more comfortable ride.
I like my bottom brackets square tapered, my shifting friction, and my brakes actuated by wire, but tubeless won me over.