I've been using a product STP, which is an oil additive. It has the viscosity of honey. But I can't say it works as good as the OP's CRC TAC-2. It does do the same webbing behavior while operating. But when the machine is off, it drips down to a catch paper towel.
So in search of a better solution, I found gear lube specific to open gear lubrication. I ended up purchasing JET-LUBE OG-H. This contains Molybdenum disulfide. This additive is a must for any use in my autos. The tests of with and without always show a major decrease in operating temperatures of gear reduction uses (from the sales pitches I've seen).
So my first install of this grease, it does not drip off like oil. I will have to wait and see if it stays in place, and keeps the gear noise reduced. The gear noise is what I always used to indicate putting a few more drops of STP on them.
As for machine rust, 35 years ago, I moved from a city close to the Canadian border (just south of Manitoba) it was dry there. My new machine shop was enclosed but not sealed from humidity (an add on to a detached garage, it had a sliding barn door). I kept coming home from work with surface rust on my lathe ways. I was using a bed sheet as a dust cover. This I later found, to slow the warming of the lathe during the heat and humidity rise of the summers here in Iowa, so the lathe stayed below dew point which caused this surface rust. A 40watt light bulb fixed this until I built a tightly sealed shop, which I run a window A/C to control humidity. I never see rust on my machines now.