I'm trying to restore 3 SS Performers.
All three have some rust inside the square tubes.
Is there a good way to remove this rust and then protect the inside of the tubes?
Poking around, it looks like an Oxalic Acid bath is popular is the bicycle community to de-rust the inside of bicycle tubes. Phosphoric acid, Citric Acid and Vinegar baths are other chemical means I've found for removing rust.
Does anyone here have any experience with acid baths and removing rust, or experience removing rust from the inside of SS Perf frame tubes? Ideally, the paint on the outside of the frames can be preserved. It is in pretty good shape.
Thanks.