Rust on my carry gun!

[Irving]

HISTORY: Gun has been carried pretty much every day for the past two years. Carried in an MTAC Spartan for about the last nine months, before that, just carried in a nylon Desantis IWB holster. **If you are not familiar with the CompTac MTAC, it has a leather back plate with a kydex body. The Spartan has exposed rivets on the skin side of the leather back plate, but that is not relevant for this situation.

So I went to my parents house earlier today and mowed the lawn for my dad. It took about two hours and I was working up a decent sweat. I was carrying my M&P 40c in an MTAC holster (so it has leather backing large enough to keep the gun off my skin). I usually wear a wife beater tucked in under the holster, and some kind of t-shirt over the top. It was pretty hot so I took off my shirt and just had my wife beater (cotton) undershirt on. I untucked the wife beater so it would cover the gun as much as it could.

Anyway, about half way through the lawn job, I noticed that there was some condensation on the left side of the slide, at the very end (exactly where is rusted in the pictures). I used the shirt I had taken off, to wipe off the condensation and reholstered the gun.

Fast forward to just a few minutes ago, I pulled the gun out of the holster to transfer to the safe just now and I saw all the rust. I figured it was just a little surface rust and would just wipe off. MOST of it has wiped off with a little CLP on a paper towel, but there is still noticeable rust on the slide now.

I'm concerned that now this will happen much more often and just get worse every time. Will I need to have my slide refinished? Should I send it in? Am I doing something wrong to have caused this? What should/could I do differently? In the mean time, is there a better method/product that I can use to get rid of this rust?

Also, I carried all day yesterday up near Pawnee but it wasn't quite as hot (nice cool wind) and I for sure would have noticed the rust last night when putting the gun away.

Thanks in advance for any input.






Here is after it was wiped off.