What case gauges are y’all using, and do you have problems with them rusting?
I live on the gulf coast and deal with a lot of humidity…everywhere.
I bought a Lyman case gauge in one of the local shops, and it rusted almost immediately. It still seems to work, although I think it gets a little sticky on cases that it otherwise would not have.
Thinking about picking up one of the Dillon gauges because they are stainless, are any of the others I see out there made out of stainless?
I have the Wilson case gages and they will rust a little bit,I live Upstate NY,so I can imagine that yours will rust up some !!! I do have a Dillion gauge in 223 that is Stainless and that is fine. Hit them with some Steel wool & wipe them down with CLP or something in between user’s !! 
I’ve had this happen to my three LE Wilson case gauges. I live in Seattle and while it’s not as bad as down south it can get pretty humid. I finally just decided to get one of the Aluminum multi-caliber case gauges from EGW and not have to worry about it. They work well but man, they are not forgiving of any defect whatsoever. For my rifle calibers I store them with a coat of oil and just degrease them when it’s time to use them. It’s not a bad system because it keeps them free of case lube buildup as well.
Birchwood Casey Barricade (formerely known as Sheath) is a great protectant. You can get it in liquid that you apply with a patch or aerosol. Or just use CLSP. But if you want the convenience of an aerosol, it’s effective stuff.
Birchwood Casey Barricade (formerely known as Sheath) is a great protectant
I have had pretty good luck with “Sheath” also, still have a couple of cans of the old stuff.
As for my gauges, Dillon and Wilson. I have tried to make a habit of bringing my dies, tooling and gauges inside to a controlled environment in the house. I have an old tackle box I use for a lot of my tooling. Die boxes I put in an old milk crate.
Summer and humidity is hell.
Just my regular workshop takes a beating, lathes and drill presses don’t like humidity either.
I have both Lyman & Wilson gauges. Both have slight rusting. One of my Wilson has a perfect rusted thumb print on the side.
I starting wiping them down with CLP when I put them away & removing the CLP from the inside when I used them again.
I have the LE Wilson gages and they did get a light coat of rust on them at first. I cleaned them up and now store them coated in BreakFree. When I need to use one I wipe it down with a dry cloth. Re coat with BF before putting back in its box.
I live in Oregon so it can be humid for long periods but not salt air.
I’ve live in the armpit of Florida and have got RCBS, Dillion, and Wilson dies and I just spray them down with a snort of WD-40 prior to returning them back to their plastic boxes. The outside of the dies are all lightly rusted but the inside of the dies are not.
I use Dillon,Wilson case gages and put them in Zerust bags along with anything else that will rust.A little coating of Starrett M1 lube doesnt hurt either.
http://www.zerustproducts.com/index.php?main_page=index
http://www.sinclairintl.com/.aspx/sid=64993/pid=33050/Product/STARRETT_12_OZ__M1_OIL___AEROSOL_CAN