Originally Posted by
vintagerando
Would this frame be a candidate for an oxalic bath? Or would oxalic acid cloud the shine of the chrome?
Do it, I think the only downside is sometimes you get a yellowish crust if the concentration is too strong. Or you could try phosphoric acid (my choice as it's faster-acting than oxalic but downside is the raw steel that's exposed goes black) or Evapo-rust or a molasses/water solution (both of these are chelates I believe)... None of them should affect stable chromium but it there rust
underneath chrome that could cause flake off.