Best thing ever an Old Timer showed me! Take Comet Powdered Toilet Bowe Cleaner mixed with MEK and make a paste. On the first step,dip RED scotch brite in the paste and rub vigorously on the scratched area. You may have to repeat these steps 4-5 times. Then take GREEN scotch brite and dry Comet “no MEK” and dry polish until you gat the desired finish. Been using this method for years,works great!