66SS parts storage

I have the original bumpers that came on my66 just back from refinishing, the car has repros on it now I want to get what I can out of the repros and save originals for later installation, I also have the original bench seat that I will be installing later as well,I want to store these, for how long Im not sure I'm afraid if I wrap these up there is a possiblity for condensation, should I just store them open, covered with sheets or is there a way to completely wrap that will work