What a good idea! I used to have birds and they are "dangerous" in that way. :)
I had a cockatoo who helped me everyday make lunch, when I would wash the greens the bird would walk down my arm take a green then back up. I finally made a thick towel into a cape for protection from the claws, never thought of poop LOL
Great idea. I think you have found a niche that needs to be filled.