How to fill and paint over chip in powder coated aluminum chair
This looks like a stress fracture in the powdercoat. So covering it may only temporally fix the problem. Zinc chromate is the best primer for aluminum I would chip the section that is loose and prime (there are some paints that are for aluminum that etch as they are applied so no primer is needed) I would then paint with a matching color, it is possible the crack was from a small area that did not get fully cleaned prior to the powdercoat. You may be able to get a replacement since it is new. I would at least ask and if not prime and paint.