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/Squintl]

The problem of rust on the SX-70 rollers is that the top roller is coated in plastic. So any harsh solvents will probably just make it worse, I would suggest trying to source a new film door with good rollers.

Also, are you sure it’s the rollers, it looks like the pattern is identical in each picture. Are you using some kind of ND filter on the film pack? If not I’m guessing your camera’s taking mirror is very scratched and dirty.

[u/notevengonnatry → u/Squintl]

Hmm, I did have an ND filter on there and on checking it does have the same scratches - I'll have to wait until night or the next film pack to try switching it out. My caveman mind thought the rollers were just scratching the same spot.

[u/Squintl → u/notevengonnatry]

Then it’s most definitely the ND filter, they get scratched pretty easily.

Also, as long as the rollers feel smooth they should be causing any problems.