I've got two S&W Model 29s, one with Hogue and the other with Pachmayr grips. Both sets of grips have been on a very long time without being removed, probably upwards of 20 years. I took them off and both have small areas of surface rust at the bottom of the frame where the grip pin is. The rust came off easily with a soft brass brush and I gave it a light coat of oil to protect that area. Should I do anything else to prevent the rust from returning? I thought about using a rust remover to totally stop the rust and maybe cold blue to protect the metal. Anyone else fix rust in these areas? I never even thought about rust forming under the grips. Luckily, that area is out of sight.