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2,035 Posts
I have always been a fanatic with cleaning my MZ.I only fired two shots thru it this year.Did my normal cleaning.#13,brush and tons of patches.Came up spotless and Ran dry patches till they were clean.I normally let it sit a few days run another patch and put a little oil on a patch and coat it.When I pulled my patch it was light brown.Never had rust before.So I rebrushed it re ran patches and ioled it again. The rust wont stop forming.This gun was shot very little cleaned very well always.Do blued barrels eventually just form light rust no matter what you do with a MZ?It was also kept in a room with constant temp.