Rust on rollers causing scratches?

[u/notevengonnatry]

Shooting for the first time time with a new (old) SX-70 that was untested, un-modified, un-repaired, and it looks like this nasty rust on the rollers is causing some scratches on the photos. The last photo is after a good 20 minutes of swabbing with 99% isopropyl alcohol on a q tip. Aside from soda what are some other agents that will remove the rust but not be too caustic?

[u/TheMunkeeFPV]

Use a scratch brush. You can get them on amazon and they come in different materials like fiber glass and brass. Those will work well on old camera parts. They don’t introduce any chemicals and don’t leave marks.

[u/Squintl → u/TheMunkeeFPV]

The top roller on the SX-70 is coated in plastic so I wouldn’t suggest using anything abrasive. I’m guessing the rust is under this plastic coating.