If you’ve been around the scale modeling world for awhile, you may remember when photo-etch first made its appearance in the hobby world. One of the first lines of model kits to feature photo-etch parts was the HiTech series from Monogram.
A commenter on a public modeling forum complained that the tools he was using were rusting and they had lost their keen edge as well as smooth action. Further discussion revealed that he lived in an the area that was very humid year round and that his workshop wasn’t well ventilated or air conditioned. This probably is the reason for corrosion on his tools, but it could have been easily avoided.