Painted my frame last weekend, using Rust Seal. Sprayed nice, turned out real nice, but (of course) managed to get a few runs. Someone mentioned getting a "run file", which basically is a blade with a built-in guide that you run across the high spot to take it down before sanding. I stopped at 4 different auto stores (3 of which sell automotive paint) but only one had access to them, but was out of stock. Anyone know the correct name for this item, and where I could get one?