ARE THE BROWN STREAKS LEFT THERE FROM THE POLISHING COMPOUNDS? IF SO, YOU NEED TO GET MORE HEAT IN IT WHEN YOUR BUFFING, SOMETIMES YOU MAY NEED TO PREHEAT THE PART TO 150 AND KEEP REHEATING IT AS NEEDED. MOVE SLOWER WITH THE WHEEL TO KEEP THE HEAT IN THE PART AND USE LESS COMPOUND APPLIED MORE OFTEN. A SISAL IS PRETTY AGGRESSIVE FOR ALUMINUM, TRY USING EMORY ON A SPIRAL SEWN.
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