To spray paint clothespins (or similar things), clip them onto an old cardboard box and tape the flaps up. they'll dry there and you won't have to worry about waiting for one side to dry at a time. Might use clothes pins for my traffic light next year!
Make colorful and inexpensive trivets out of clothespins! Aren't these wooden clothespin trivets fun? Heat resistent glue and maybe a piece of wood or felt to help hold together more. Can be plain wood or painted