I use Polident to clean many things...how about presser feet?
Several years ago, after FIL died, MIL insisted I take a very large, unopened, box of Polident tablets home. Neither DH or myself have dentures or partials, but she really insisted.
I learned they are most excellent for cleaning narrow vases, teapots and their spouts, thermal jugs, coffee makers - all sorts of hard-to-reach and easily stained items.
Would it be possible to clean old presser feet with them? Or would it be safer to stick to Evapo-Rust?