Florida guys...AC in shop?

[FlintTony]

I just finished building a 40x60x14 shop down there. Post and beam construction, metal roof and sidewalls, 6" sidewalls, with 6" of spray foam insulation. I have some miscellaneous tools and equipment in the building that were there all summer. The humidity has caused some rust to start showing up. When I go out there in the morning, it is 10-15 degrees warmer than outside temperature. I open both garage doors to let it cool off, but then the humidity gets to everything. So the question is, short of a full AC system, what do you guys do about the heat and humidity? I have a huge fan that I have been pulling air through the building with, but am not satisfied with that. I am thinking that AC is the only way to go, but I see lots of buildings that do not have any AC. Do you just put up with it and get used to it?