If you have a lathe and a die grinder, sleeving brake cylinders is a pretty simple procedure. Sleeving with seamless stainless steel tubing makes an original cylinder "better than new" and it will outlive most of us without ever having to worry about pitting or corrosion.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!