Re: Hydrochloric acid (brick cleaner) to clean s/s props?
Stainless steel is only "stainless" by virtue of a molecular layer of chromium oxide on the surface. Hydrochloric acid destroys this layer and the steel will then rust. It should do no other harm.
It is for this reason that hydrochloric acid is used in stainless steel soldering flux.
If the suface of the steel is subsequently abraded to expose a new surface, the chromium oxide layer will re-form.
Don't expect mere proof to sway my opinion.