I got bored and decided to polish the receiver of a break action shotgun I bought for $60. I got it polished the way I want, but I want to know how I can protect it from rust, without changing the color (bluing, etc;).
Is there any product or procedure I can use to keep the raw metal from rusting, that is more long lasting than simply keeping it oiled? I plan for it to be a knock-around woods gun I can keep in the trunk of my car.
My last option is to hose the receiver down with spray on truck bed liner like I did for the barrel, stock, and fore-end.