No need to torment the poor bird. If you need to paint outdoors (I do), and want to leave the items outside while they dry, how about a shielded paint board?
Take a piece of plywood, whatever size you like, make a cover that fits it from small wood and hardware cloth (wire mesh), and hinge the cover to one side, with a latch on the other. Open the cover, paint the items, then close the cover while they dry. With the right latch, and a cover higher than the bird's beak is long, the parts will be safe.
If you want to be fancy, fasten the board and cover to a post, and paint the items on a paper plate. You'd only have to carry the painted items and the paint back in, not the entire contraption.