my older 2003 model 60 marlin has bluing thats almost gone from the barrel. i am worried about rust issues as i hunt in the rain. i have tried cold blue and it just won't stay. my idea is to use paint, what type paint would work thats also resistant to oils, or some other methods. the mag tube is still nice and blue so i will be wiping it down with oil and oil will be getting on the barrel. i can't afford to have it redone by a gunsmith, thanks for any help and idea's ya'll can give me.