[Rifter]

Was wondering if anyon uses one of this to control humidity in the garage.

http://www.homedepot.com/p/DampRid-64-oz-Hi-Capacity-Moisture-Absorber-FG50T/100391308

It isn't really bad in my garage but enough to bother me. I keep my press with a light coat of silicone spray and that is working to keep it rust free but the parts that I can't spray, I have to clean regularly to wipe off rust or finger oils so it doesn't rust.

DampRid does a good job. I use it in my basement loading room. Don't need it much in the winter, but in the summer it sucks an enormous amount of water out of the air, even with air conditioning. Figure your cubic feet and get the unit for the next step up from that amount of coverage. Also, keep the air circulating. When it isn't, that's when moisture can settle out on surfaces, even if you can't see it, and things start to rust. When it gets hot and humid here in August, you should see the water that runs out of the central air unit from the change in temperature as it cools the air.

 

[Rifter]

True, but even then unless you build a wall in place of the door its still allowing all heat/cold in. Metal door + gaps at the top, sides, and bottom = non-conditioned for all intents and purposes.

I think if humidity is seriously an issue, you need to condition the space... I can't imaging a 64oz. bucket of absorbent material doing anything when an area like that requires a small window unit at the least to keep it dry.

Its actually fairly easy to seal off a garage. I've had a number of friends over the years who turned their garages into apartments, or man cave type setups. Throw some cheap fiberglass insulation into the walls, seal the garage door around the edges (they make stuff for doing that), and if you are only using part of the garage, get some of the heavy duty plastic sheeting like they use at construction sites to create walls and overhead around the area you are using. Its essentially air tight, so it can be kept relatively low in humidity. Think outside the box, there's always a way to get where you want to go if you're willing to do a bit of work.