Wow, I appreciate all the replies and have learned a few things too. I probably won't put anything up there. Maybe a more powerful A/C.

SW_radial, My garage (the one attached to the house) gets sopping wet just like you describe for your metal shop. My metal shop (6" fiberglass insulation inside the metal walls & metal studs) never has condensation. ? go figure.

Again, thanks guys. Dave.

Dave.

What's the last thing a red neck says, "Hey guys watch this."
What's the last thing a redneck hears, "Go ahead Bubba, you can do it."

Build plan: 65 Chevy one ton, 5.9L Cummins HO, NV5600 six speed, 2wd 1972-1987 IFS disk front, frame off restore/mod, custom dump/flat bed, Alcoa rims, Dana 70 3.73:1 duals drum rear, plush interior, Guards red with Marine Corps decals. Donor is retired 2002 Ram 2500, 194K miles.