I told you about WD40 right?
Yup, I bet 4 wheel drums would look just dandy.
I just got through unsticking (derusting) some Metro front brakes. Not only was the rust building up in the grooves for the piston seals and dust seals, pushing them against the pistons so they wouldn't retract, but the pad cradles had rust under the stainless pad seats, pushing them tight to the pads so they weren't free to move either!
I hate disk brakes on cars.
On yer disks tho', having them turned would likely get rid of most if not all the pits.