Home Depot, etc and most hardware stores should have the silicone spray. Also auto parts stores. Cost - not sure, I don't buy it often and for "normal" use a can lasts quite a while. How much? How big is the statue? You want to have a good coat on it, so you will have to guess. For your frat deal, I don't think you can put on too much. This would be a lot easier if you you were doing a drop-dead case. lol
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