Rust was a BIG item for me too...Not as bad as you have it close to the water. I even had dies rust in the plastic box..!
I found myself cleaning and oiling items in my shop all the time. The shop use to be just a framed in building with no inside walls. Like most garages are.
I went through a phase of looking for the perfect metal protection to keep stuff from rusting.
The best thing I found that worked great was EEZOX.
My walls now are 7 1/2" thick all over. I wanted it to where I could light a candle to keep it warm in the winter, and use ice cubes in the summer to cool it off.....Its not quite that good..but close, plus its very sound proof.
Thats why I mentioned it...its very important to protect your investment of tools and mics. stuff...!!
Don2
The rust is a continual fight. Thankfully for the last 17 years I have worked as an IT admin for a company that does a LOT of print production work. All of our toner replacements for the printers come with decent sized dessicant packs in them. I have been collecting them for years
Next up on the list is the insulation... Its a three car garage and the wife said I could have the third bay for my area!!! So it may be a while until I can get all of the insulation. I have two really big fans that I crank up when doing wood working but I dont think it would be so good to have those running when I am dealing with powder or those really small primers