It is possible to refinish the TCC2 using vinyl wrapping. We have 3D and drawing files available below (under Technical Downloads) for exact measurements.
https://www.sennheiser.com/en-de/catalog/products/meeting-and-conference-systems/teamconnect-ceiling-2/teamconnect-ceiling-2-black-509161#Downloads
Our recommendation is to source high quality vinyl wrap, and utilizing a local vinyl wrapping specialist - such as within the auto industry - to assist.
We don't advise re-painting the TCC2, as this can void the warranty in the event of an issue and can also risk affecting the capsules performance.
Attached is also a downloadable pdf guide on Vinyl Wrapping your TCC2 unit.