Hi Jack. This is what's stated in Magico's manual:
FOR ALUMINUM PANELS USE A LINT FREE SOFT CLOTH (PROVIDED IN ACCESSORY KIT), DAMPENED ONLY WITH WARM, SLIGHTLY SOAPY WATER (A SMALL DROP OF DISH SOAP WILL DO). DO NOT USE CLEANERS THAT CONTAIN AMMONIA, STRONG SOLVENTS, OR ABRASIVE MATERIALS. USE OF THESE CLEANERS CAN DEGRADE, SCRATCH, OR DESTROY THE FINISH.
This is what I did the second time, with liquid soap, nothing much happened. White markings still remain.
FOR ALUMINUM PANELS USE A LINT FREE SOFT CLOTH (PROVIDED IN ACCESSORY KIT), DAMPENED ONLY WITH WARM, SLIGHTLY SOAPY WATER (A SMALL DROP OF DISH SOAP WILL DO). DO NOT USE CLEANERS THAT CONTAIN AMMONIA, STRONG SOLVENTS, OR ABRASIVE MATERIALS. USE OF THESE CLEANERS CAN DEGRADE, SCRATCH, OR DESTROY THE FINISH.
This is what I did the second time, with liquid soap, nothing much happened. White markings still remain.
What does the manual recommend? Aluminum "rust" is white, similar to the raw color. I hope the whitish marks aren't oxidation.