Soak your hands (or clear clothes) in sol (A).
Then a brief wash with plain water and apply the sol (B) to the ex-brown
spots (after the metabisulphite bath they should look yellow).
This treatment works very well not only for your hands but for darkroom
and labware.
Just my two cents...
Jorge Moure
administ@jmoure.recom.edu.ar
--- JORGE ROBERTO MOURE administ@jmoure.recom.edu.ar