UBB.threads Forums Edged Weapons SA & NSKK Dagger Forum Plated vs Polished

I have a question. Bill Shea has a Heer dag listed as nickel plated and he states its got great crossgraining. I thought only polished steel blades had this crossgrain beautification. How is it that a plated blade has it, on an earlier thread I remember them say no plated blades could be polished because it would have an adverse affect...What gives.Tiep