[Jim Arco] ” fading, stains, scratches, grain, and spots”
There are numerous techniques, hardware and software for doing remastering and restoration. DVNR, PFClean, Davinci Revival or painting manually in photoshop/AE/iQ/Smoke/Flame whatever.
[Jim Arco] “…I would love to have the tools…”
I’d reckon the most costly tool in this sort of a project would be the film scanner. Or scan the footage somewhere else with a good colorist.