I keep a Glock 27 mounted to the head of the bed in a holster for home defense. I took it out to go to the range and upon cleaning it, I saw something that looks like possible rust. By looking at the slide under normal light it appears as it always has, a dark matte gray/black color. But when I shine my surefire light at it I can see what appear to be small dots of discoloration. There are about 5 or so small spots, and the spots are almost perfect circles. Also, where the serrations are at the back of the slide there is a slight orangeish color in the craks.
The apartment I live in can get hot and can at times be pretty humid. I think this is do to it being in close proximity to one of the laundry facilities. But I always keep my firearms clean and properly lubed. This is the only gun that I don't keep in the safe.
Now I don't know what these spots are. I wipe all my handguns down with a silicone cloth on a regular basis, but I don’t know if that is enough. Should I be oiling the exterior of the slide? I really don’t understand how perfect circles could form on the slide like this. The only way I see it could even get wet is from flying sweat after some freaky sex. But I highly doubt that.
Anyway, I just ordered a buncha crap from Sentry Solutions like the Tuff Cloth and hope that helps. If anyone has any suggestions I'm all ears.
Thanks.