Dmitry,
please check the archives before posting a questions (searching for http://www.caswellplating.com) :
http://search.bikelist.org/
here is one thread topic that doesn't show up on that search, but it describes the rather involved process to replate some tiny rusty campagnolo brake nuts :
http://search.bikelist.org/
here is one more website showing results of brush plating, and mentions that one set of bits had to be replated :
http://www.nonlintec.com/
Good luck,
- Don Gillies
San Diego, CA, USA