Didn't look or clean them for at least 2 years.
(Posted before with rubber grips)
Decided to pull them out from the safe and give them a good cleaning.
Two years ago, I brushed these 3 with RIG grease without grips and placed them in Bore Stores.
No rust or brown spots on cleaning patches...none whatsoever.
Put on the original grips that came with them.
(More classic looking with the original grips)
SW M60 (bought 1976 - 43 yrs old)
SW M66 (bought 1973 - 46 yrs old) This 1970s model has stainless steel rear sights.
SW M29 (bought 1975 - 44 yrs old)