I know at work, we have pieces of aluminum that are gold plated. We use ethanol to remove permanent marker off of it. I have also used it to take the marker off of wood that is staind and didn't see any effect on the stain. I know that it should leave the base very clean with probably no trace of the marker. I am not sure where you might be able to get plain ethanol at. It evaporates very fast and the paint should be ok if you do happen to get some on it by accident. If you try the ethanol, a qtip that is damp but not saturated in it will help keep it off the paint.
A good fix for Sharpie marks and the like is a product called Sol-u-mel, which is sold by a company called Melaleuca. It will take the marker away without damaging the paint if you get it off right away. Our younger child took to coloring his Lego Star Wars figures with Sharpie, then decided he wanted them to be back to the way they were. If used repeatedly it will strip away the paint/lacquer though.
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