You see, both something like "mit Originalpolierung" and "poliert" can be sensibly rendered as "polished" in English. One describes a state, the other something that has happened.

If I was to say something "ist poliert" and something else "ist poliert geworden", you would (hopefully) see a difference, but if I just say the former, you might read it as the latter.

By polished, I think Abel meant something unequivocal like "ist (ab Hersteller) poliert" but the possibility is there in English to read "polished" as the process, not the state.

So there you go, neither one of you is wrong, capitalised or otherwise :) Honestly, I should have been a diplomat!