The shop I recommend is Superior in Cloverdale.
http://www.superiorelectroplating.com/In the past, people would bring me their door handles and locks for assembly after plating. This let me see the work of a couple of local plating shops (Dependable, and Pacific). And all of it was sheer CRAP.
One day when Airspeed parts was still around, I had a chance to see some parts Jim Coma had done at Superior. The parts weren't a
little bit better, they were in a league of their own. Well beyond the junk others were producing.