Glen in 1977 I moved into the home I built that was at 900 feet elevation.? I had a shop that was at the back of the garage (separate building). The next summer I got my first mill and old Induma.? That next winter we experienced the coldest winter that anyone remembered up on the hill.? The temp ran below zero with a high temp of 9 degrees over a two week period.? Not what Oregon is all aboutL? Anyway after the cold spell it wormed up to 55 degrees over night with a steady rain. That next morning I went out into the shop and what I seen I could not believe.? There was a steady stream of water running off the spindle of the mill.? Water was running off the mill in rivers, the floor was covered with water.? So that much cast iron that cold for that long and soon as the temp went above freezing water stared condensing out of the air all over the mill.? What a rusty mess I had. Tools in the tool box rusted every piece of metal in the shop had water standing on it or running off it. Never seen that before or since but that is what can happen to frozen metal then subjected to very worm most air.? Oh and learned to hate that induma mill but it was the start of Turk Mfg.J? Dennis

?

?

I have to say, my gun safe which has about 40 pistols and a couple of long guns in it has done well using a goldenrod. It keeps the environment inside around 140-150 F.

?Some of the rarer handguns also get petted with a rag with one of the three rust killers.

?Being inside the house though seems to make the long guns that are not inside the safe free of rust.

?Here's my understanding (FWIW) of what happens in an un-insulated shop. All night long cooler air loaded with humidity wafts through the shop cooling everything. The cast iron acts as a heat sink, only as a cold soak instead.

?In the morning the inside air is replaced with warmer (But still humid) air, which, when it touches the colder cast iron condenses. I've watched it happen often, sometime running tiny rivers, but most often just taking on a duller cast which is the microscopic beads of water refracting the light.
?Seeing that a guy naturally grabs a paper towel and wipes it off, and that also wipes off the protective film of rust prevention.

?My wife and I feed a number of feral cats outside the house, and of course we made little boxes for them to sleep in. At the bottom of the boxes, below the pallets they sit on, we place aluminum plates with old hot glue gun elements clamped to the plates (One per 8X10 1/4" thick plate). The power comes through a simple PID controller that turns the power on at 40 F and off again at 65 F.
?That works real well but I can't buy 6 or 8 of those for the machines at the hangar, they're $48 apiece.