Yeah, I think the spring will look cool exposed. I too am considering it. If the springs are powdercoated or epoxy painted, there should be no corrosion.
I printed three white shirts with a white reflective logo and three black shirts with the logo in black reflective. They are all fitted medium shirts from American Apparel. Expensive shirts, but the best. If you seriously want one, I'm sure we can work something out.
--Chris