Rust/sweat protection on slide

[bellavite1]

My Shield's slide developed quite a lot of pitting by sitting against my skin in the summer time, most likely due to sweating.
To the point that that I just sent it back to S&W to see if it may be a finish problem.
I'd like to keep this from happening in the future.
An article on Brownell's gave high grades to using WD-40.
Not sure whether I should let it sit on the slide for a while, just wipe down the slide with it, how often?
What is the general wisdom?
I don't necessarily want to go through the whole Cerakote/Duracoat route on such an inexpensive gun....

[Squeeze]

A holster with a sweat shield will help. If that is not an option, and I find myself in the same situation, when I take my M&P Shield off after wearing it, I always wipe down the exposed slide then add some gun oil to it, rub it in with a cotton rag and let it sit until the next day.

[BPTactical]

Irving had the same problem with his Smith. Must partly be a persons PH level.

Ayup, some people have sweat that is like nitric acid.

[wctriumph]

I used a holster with a sweat shield or a pocket holster when hot out. Because of pocket carry I inspect and de-lint every evening after carrying.

[Zundfolge]

I thought the Shield slide was stainless steel?

[wctriumph]

I thought the Shield slide was stainless steel?

Stainless can corrode and less pure forms can certainly rust. I worked with many different stainless alloys when I was working as a machinist. The stuff we used for military parts was always top grade and sometimes very hard to machine, needing special cutting tools (expensive) to get the job done.

[thedave1164]

DuraCote or Ceracote

[Delfuego]

DuraCote or Ceracote

Speed Stick & Gold Bond

[ray1970]

Wife beater would help some. At least the firearm wouldn’t be in direct contact with your skin.

[Irving]

I thought the Shield slide was stainless steel?

My M&P rusted right next to the Stainless Steel rollmark.

Edit: I'll dig up the photos when I get home, but the thread is still on here.

I had issues with leather holsters retaining moisture. Smith & Wesson replaced my slide. It sounds like an under shirt would solve your issue. As Ray said, wife beaters are the least like wearing a shirt, but at also long enough to tuck into your pants.

Kydex blocks moisture from your body, or at least doesn't retain it. Nylon breaths better. My solution was to line the back of my IWB leather holster with duct tape. That might be pretty uncomfortable without a shirt though.