Not sure that is a good idea due to the smell spray paint gives off even after it is dry. I would just get a cheap after season vest for a buck or two and either pin it or sew it on to the back pack. No need to give the critters and more of an atvantage then they already have.
I don't wear it to hunt. Just haul meat out after the kill.
I usually just wear a waist pack to hunt in. I carry some food, and everything I need to dress out the elk. I then carry back the backstraps and loins to the Jeep. Lock up the gun, and grab the big backpack and go get the meat. At that point i'm not hunting anymore, but I think the blaze orange laws still apply.
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...