Take a large sewing needle and grind off the tip of the eye creating a little "wishbone". Use a piece of wood dowel rod for a handle and drill a small hole in one end. Place the needle point first into the handle. The wishbone end of the needle will pick up glue, oxidation acid, or any other liquid you need to place a small amount and it stays in the notch until you touch the work where you want it. Sure beats the blob on the end of a pin.