Repairing Trim 1965 Valiant

Hi all,

I recently got my valiant back from paint and have started putting the trim back on. Noticing some of the trim is pitted and I am just wondering what my options are for fixing what I have. It looks like the bumper and the rear tail lights bezels are chrome, as far as the rest of the trim I am not sure if it is anodized aluminum or stainless steel. Is there an easy way to tell? Thank you for your time.