So I initially picked up a polished valve cover. The fins on it looked like they were polished very aggressively. Rounded over and just overall not uniform.
So I returned it and got the “wrinkle finish” what they call wrinkle finish looks more like a hammer finish, and it is all over the damn thing. Even on the surface where the seal goes. Something tells me it would make a lot more sense for this to be smooth. In addition to it being a mediocre casting.
That said these things are pretty cheap, so it's no wonder the quality is sub par.