rust protection mossberg 500

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shiftyer1

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Ok I may have a friend who keeps a mossberg 500a behind the seat of my or I mean HIS truck. lol Anyway I have a truck gun and am having trouble keeping the outside of the barrel from rusting. This gun is always in the truck in all kinds of temp and humidity variation. So whats the best way to keep the rust away? Is my only option weekly oiling sessions? I hope thats not the case. I've so far used hoppes and wd/40 to no avail. I'm even open to spray painting the barrel. Aside from light outside barrel pitting it's in great shape the interior never rusts just exterior. But it's a truck gun so useful doesn't need to be pretty which should leave me lots of options.

Also if anyone around Austin TX wants a pgo for a mossberg 500 in 12Ga i'd love to swap for a synthtic or wood full buttstock. Or if someone has a full stock for sale cheap let me know. Not really interested in shipping because they can never find my house. I don't find pgo helpful to me. Of course the bolt and washers need to be included in either case.
 
As far as protection, I had the exact same problem with my 500. I put a few coats of duracoat on it and it hasn't had a spot since. For the record, The duracoat went on 2 1/2 years ago and has been used for duck hunting. It has been fully submerged more times than I care to count, been thrown around the boat and truck bed, and is still holding tight. The duracoat is easy to put on. Just make sure you prep the surface right for ANY coating you may put on it.
 
Robar NP3 or maybe a good coating job...

I'd get Robar's great NP3 plate work, www.robarguns.com . They do work on shotguns and other long guns too. Other good coatings or plate services are out there but I'd say Robar NP3 is one of the best for protection and long life.

:D

RS
 
Everybodies suggestions so far are feasible and liable to work. honestly what I'd go is get a really hot blow dryer or something that puts out a lot of heat and heat the outside of your gun so hot you have to hold it with gloves or oven mitts and spray some oil (I like Outers, its a little thicker and greasier than newfangled gun oil) onto the gun and rub and rub it in deep. Continue heating the gun until its very hot, then apply one more coat and rub in. I've found that's a good way to deal with guns that are subject more to the elements or stored for long periods of time. I also do it with all of my pistols when cleaning. That's about the best you can do with a blued gun which I'm assuming yours is. Honestly with a truck gun chracter wear like your experiencing is kinda cool in my book. There's no prettier gun in my opinion than a well used 18.5" mossberg shotgun.
 
Instead of the blow dryer, could you just oil it when it heats up at the range?
 
Theoretically getting it hot at the range would work too especially if it's just a truck gun and you don't care too much about spiffing it up. I'd try the heat gun with Outers or Hoppes first and if you find it's still acting up I'd try some Grease like Mobil1 syth red like DeltaBoy suggested with the heat gun. Remington makes a moisture guard "chamber plug snap cup" thats interesting too. It works as a snap cap but dehumidifies your chamber like dessicant gel would in a gunsafe. Maybe keep one of those chambered as your first shot? and switch them out every few months? they're like 5 bucks.
 
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