Atreus palmrest finishing?

Does anyone know what substance was used to finish the atreus palmrest wood? Mine is developing some uneven shine (where i rest my wrists sometime) that I assume is due either to rubbing smooth or hand oils, and I want to know more about (a) proper cleaning and (b) what I might be able to do to finish the whole area to be more uniform.

@jesse seems to be very busy theses times, but I think he is the only one person that can give you a response…
Maybe this thread can help you (I haven’t re-read it, so maybe not :-)) :

It is indeed polyurethane. But the bit quoted there is from the Model 01, which was a totally different supplier