All the guns I've bought so far all have minor blemishes on them. I've had 4 Sig Sauer handguns go through me now and none were perfect. The closest one was the P229 which I still have. In terms of PCP's though, I've only had a Taipan Veteran but I've had 6 of them of various calibers and sizes go through me in the past few years. None were perfect. Every single one had a minor blemish on some parts here and there. The worst one was a noticeable dent on the air cylinder and the entire gun was replaced by Talon Tunes.
If you look at the video of the assembly of a Taipan Veteran, it's easy to see how parts pickup their marks along the production process. In the video, you can see bare barrels stacked together in a larger wooden box, completely assembled guns stacked beside each other inside a box with barely a visible divider between them, and even the assembly process itself, you can see tools hitting various gun parts on the table. It always makes me cringe when I watch a assembly/disassembly video of the Taipan with someone screwing and unscrewing the barrel or the air cylinder without first completely removing the center trigger/scope mount clamp assembly. The video shows that this is how they assemble it in the factory, but do it enough times (to adjust the regulator) and the barrels and air cylinders will pickup marks from it.
I'm not defending manufacturers as I'm a bit OCD about this stuff as well but it seems hand assembled guns like these will just invariably pick up marks along the way. Either that or considerably raise the price because being extra careful can easily double or triple assembly times. Or get robots to do it. Really, the only most perfect gun I got out of the box was my TX200... But even that was a replacement because the first one had a bit of minor rusting on the breach cylinder.
I know it's not the same gun but I thought it might provide some insights on what's going on. I've just come to accept that it's just the way it is. If the gun is functioning perfectly, and the blemished parts are not all that bad, I just try to live with it because even if I get it replaced, the replacement will most likely just have different parts blemished. In some cases, probably even worse than what I already have.