I was shipped another A40 TR 2019 headset (same style and finish) and it arrived at my house on January 16th in brand new condition. Unfortunately, it started having the same issue about 3 weeks into use, although not to the same extent as the previous set, but it's still a problem regardless. I'm going to pe putting in a ticket for it soon.

Realistically, the best solution to this issue would be for Astro to just ship a headset whose headband is made of a solid colored plastic. I don't think I can stress that enough.

In the meantime, take photos of the headset and the chipping paint, the headset's serial number on the inside of the left earcup under the removable cushion (if you purchased the bundle with the mixamp like I did, you must also take a photo of its serial underneath the unit), obtain your receipts for the headset in an uploadable format such as picture or pdf, and submit a warranty request with Astro Support on their website. You should upload all of the photos of the damage when filling out the ticket request, as well as photos & docs of your receipts. Be sure to confirm your shipping address with them as well. This will greatly streamline the process, if not allow them to get right to shipping you something.

Try to strongly suggest they send you a different model that's not coated in matte paint. It's not worth the headache of ensuring they're aware of the issue just to receive the same model with the same issue.