You admit a lack of knowledge yet you say that they CAN
do it. How would they? Spraying one finish on the rest of the neck and frets and one on the inlays would require a huge amount of time and custom work. Inlaying the blocks after the finish is sprayed and leveling them to the finish is about 10 more difficult than that. I've built a fair amount of basses and I work professionally building and finishing wood products and what you are saying would be a laughable request for most builders.
I said they CAN based on earlier comments from people whom I presume to be knowledgeable on the subject who explained how it could be done.
From the "common sense" perspective, my thoughts would have gone like this:
I have seen necks that look like I want (see previous post).
I know that Warmoth uses CNC machines.
I know that "pearloid" means it's not real pearl, so common sense suggests it's thin plastic, and thus flexible.
I know that the standard process for painting bodies is to seal (if needed), prime (if needed), spray color, then spray clear. "Common sense" would suggest that painting necks would be roughly the same.
With all those "knowns", "common sense" would make me think that the neck would come out of a CNC machine with the shaping all done and the fret channels already cut. That means, basic radius already done, and routes for inlays already done as well (to the fretboard radius).
At that point, I would expect the neck would get final hand finishing of the surface sanding. Then spray (or dip or whatever) of the color. Then inlays and frets installed. Routes for the inlays were done on the fretboard's radius, so no need for more radiusing. Then final spraying of clear.
Where reality diverges from that is not something that "common sense" tells you. It's something that prior knowledge of luthiery and/or woodworking tells you. If I'm wrong on that, please explain how.
Which brings me back to my original point. Calling the OP an idiot for thinking he'd get a neck that looks like the '77 J neck I just posted is completely inappropriate. And if the guy is not an idiot for expecting that, and was, in fact, perfectly reasonably in his expectations, then how can you argue that it wouldn't be a good idea for Warmoth to anticipate this exact situation and tell people ahead of time that they're not going to get what they expect? In the end, Warmoth is the one that is going to potentially give a full refund. So it is absolutely in the best interest of their business to inform the customer, in a situation like this.