Auggie had his beak 'groomed' regularly when he was very young and growing a lot.
Basically they just buffed out the flaky parts and smoothed the edges so his beak closed well, then put on some mineral oil. It was great, he loved it (perhaps not the process, but the result).
I get the impression that it is a bit uncomfortable - maybe itchy - when they're beak is peeling; so if we can help them out why not.
I just recently went to a new vet for a check up and nail trim, and they asked if I'd want them to groom his beak as well. It had been years, and he was in a phase of 'beak shedding' so I said sure, why not. Except they didn't clean up his beak like my old vet used to, instead they just sanded the tip of the beak. The TIP was in perfect condition, the peeling was elsewhere. I couldn't for the life of me imagine why they would do it this way ... until I realized some people might want to dull their birds beak if they're often getting bit - then I was disgusted and a little angry.
This is one (of oh so many) reason that I'm not going back to this particular vet again.
I think for young birds a *proper* beak grooming can be a wonderful thing. But this is not about sanding down the tip of the beak.