With my very first revolver, I had never cleaned the internals. I was an 18 year old whippersnapper that never was taught to do so. After 10+ years (probably 15) I finally did it-the mechanism was full of a grayish muck I would describe as a mixture of gun oil and what appeared to be graphite from the powder (picture antisieze), but there wasn't any trace of corrosion at all. I've settled on a routine of thoroughly cleaning the cylinder and barrel after every outing, with a detailed wipe down of the frame exterior, but only get into the lockwork once a year. This is an old pietta pocket police, and to its credit has never skipped a beat. No problems so far.