On 10 June, 14:11, chunkyoldcortina wrote:

Normally cast iron grills are porcelain coated (but not always).

Stainless steel grills are chromium coated.

Stainless steel grills aren't plated, as they don't need it.

Cheap grills that are chrome plated (most of them) are just mild steel
underneath, and they'll rust once wear has started the plating
flaking, or long-term rain exposure has permeated it.