I have PAMP kilo bars that are shiny and a few that are frosty, otherwise weight and dimensions are the same...all bought from major online dealers here and came with certificates.
I dont expect too much (in the finish department) when it comes to PM 10 oz bars (theyre just blobs after all )... that way I dont get disappointed.
Sadly though, they seem to have the same approach to their premium priced (but bullion as they repeatedly point out) Lunar coins - and its bad luck trying to get any recourse if you didnt buy them directly from the Perth Mint.