I've been using Wildlife Research Center's "Scent Killer" Autumn formula religiously for several years. It seems to work pretty well. I go thru a quart a year or so, spraying down everytime I put my hunting clothes on and then respraying periodically while on stand if it's hot out. It is a little of both ... a scent killer and a light cover scent.

http://www.wildlife.com/catalog_newproducts.htm#scenteliminators

... Shockwave