Gold Duster decal stain

This is where prevention is key. Not overfilling the gastank, watching for any splashback as you are filling up; and washing off the area below the gascap asap if gas in spilled or splashed. If it is not cleaned up the gas will also stain the paint eventually. I have used the gas stations windshield washer squeegee many times after a fill up and then used soap & water or waterless cleaner when I got home.
C