How do you get surface rust of a S&W M&P 40 cal. gun??

Question

Gun has a tenifer caoting and when I carry it and sweat surface rusts forms on the gun. Does anyone have suggestions on how to remove it?

Answer 1

As a Gunsmith, I would suggest you avoid using WD-40 on ANY modern Polymer frame firearms regardless of manufacture. In days when Stainless Steel was used in manufacturing 100% of handguns, you could get away with it but not now. The jury is still out on the negative effects of WD-40 on Polymer guns. You would be much better off to use a product like CLP/Breakfree which is designed and safe for Polymer firearms or any one of a dozen other products recommended and manufactured safe to use.The days of WD-40 and Steel wool are over except when removing light surface rust off of "Blued" (Hot-Salts Bluing process-- Rifles & Shotguns)....Your M&P has a "Melonite" finish and will not respond well to steel wool, aluminum foil or other abrasives. You will find that what you are experiencing is actually oxidation/corrosion from sweat (acid) which is corroding your slide. Smith & Wesson will repair it free of charge if you return it as part of their lifetime warranty

NOTE* If you think about it WD-40 has been around many years before Polymer frame handguns were ever on the market or designed for that matter..It would make sense that the New-Polymer frames firearms are going to require other cleaners-lubricants-solvents, that will clean them without damaging them....

Answer 2

are you sure its rust, its a stainless steel slide with S&W's parkerized finish (I think they call it melonite) although its possible it could rust its not likely that it would and if it is rusting I'd get on the phone to S&W customer service as that may be covered by the lifetime warranty and they may refinish it for you or replace the slide.
If your using a leather holoster it may just be dye transfer but your basic cleaning solvents should take care of that.

my m&p 40 has been put on fishing duty as I no longer trust it for daily carry, it now spends its time with my waders and has been in and out of the water for about 10 months now and shows no signs of rust, granted its fresh water.

Answer 3

I can't tell you what type of pistol to buy for someone. A gun will fit each person differently, and your son may not be comfortable with a glock, where as he might be more comfortable with a Sig for example. A certain model of gun might fit one person but not another. If a person isn't comfortable with a particular gun he/she is less likely to use it. Personally I'd take him to the shop and let him try out a few different guns and find out which one he likes best and fits his hands best. Your son is not old enough to legally purchase one himself and cannot purchase ammo for it either just for reference, so you'll have to purchase the gun and ammo for him until he turns 21. Its a nationwide law.

Answer 4

Halsca hit dead on, plenty of WD-40, and the finest steel wool you can find.

FWIW, the stainless steel used in firearms is not true stainless steel. It has had enough carbon added to ease machining. It is highly rust resistant, but it will rust.

Doc

Answer 5

M&p Rust

Answer 6

real fine steel wool & gun oil.* Heavy duty Aluminum Foil crunched up in a ball, use it like you were using fine steel wool.* No joke, it really works.*

Answer 7

Very fine like 00000 steel wool and WD-40. Use plenty of WD-40 otherwise you'll dull the finish.