When the finish on the bottom of your ride is as important to you as the one everyone else sees, you need a set of jack pads — like these “Prothane” pads from Summit Racing. They’re softish, red, and look like a three-inch-wide hockey pucks, but they’re actually designed to sit on top of your jack’s steel cradle to avoide metal-on-metal contact between the jack and the car.
They’re pretty reasonable at $7 — though the seven-inch version is a bit pricey at $20. On the other hand, they’re a lot cheaper than a re-spray should you slip a little from time to time. Show car + jack divots = bad.