I have a Lee 356-125 mold hollow pointed by Eric. Just hypothetically, let's say a dummy somehow dinged one of the edges on the interior cavity near the nose by the hollow point pin, and that hypothetical mold now casts a little burr on the nose, small enough to be removed with a fingernail. Is there any way to fill in that little ding and polish it back out? What would you use that could stand the heat?