Get a few colored tarps of the size needed to cover it up and change them out occasionally.
At least that is short money!
I used tarps before the roof and during Sandy my heavy duty canvas tarp was last seen at 10,000' over Berwick, PA. Dave tried to shoot it down. However, your negativity about coatings is listened to and I'm thinking fence poles and fence 16 x5/4x6" that I buy by the bunk load is not much more expensive and just hide the damned thing. Let the concrete just do it's thing. OK Mr Whistle 2000 tons into this fuel, let's see your storage solution, gotta be a doozy.
Thx everybody for the input.