Hi @maravd23 I used sharpie silvery. You can skip the sanding. I suggest trying on small area first.
Thank you both @MitchellMc @EricL sanding the area and painting using pen paint worked. thanks again!
Thank you, @EricL ! are you able to recommend products I can use to DIY? Maybe spray paint?
I accidentally damaged the aluminum panel in my shower. This was caused by a cleaning chemical. Please can you help me how I can fix it?