i asked cause i have to replace my master cylinder and they are SO nice when you get them but in a couple of year exposed to humidity and dripped brake fluid, well you all know!
Depending on the year the MC has a unique plating that is not very rust proof. Check with MasterShake340 as to what it is since I cannot remember off the top of my head. Had some plated that I did not protect with RPM and they rusted up pretty quick. The plating shop had mercy on me when I re did them. Put RPM on the and they have looked great for 4 years now.
