A follow-up on this:
I never got an acceptable resolution from either the merchant I bought it from or from Anvil (i.e., Blichmann).
The customer service of the merchant is not the subject of this thread (and I won't elaborate further), but I believe the complete lack of response from...
I'm positive they are not your typical buffing marks. I can get my fingernails stuck in them. Regardless, there is pitting everywhere in the marks, which is probably what they were trying to get rid of (or cover up?)
I hate to be that new guy whose first post is a rant, but this thread always pops up at the top of searches about Anvil fermenters.
I just received mine, and straight from the factory there is a 1 inch wide band of really rough machining marks in the inside wall running along above the bottom...