It isn't paint, Riko. It is black plastic processed in the matte finish. That is why the polystyrene rubbing against it on some peoples was actually buffing it up from the friction in transit. It marks extremely easy.
Just to clarify, when I checked and fixed these marks it was never fingerprints. It was the polystyrene packaging pressing onto the plastic marking it. Causing it to appear at first thinking it was thumb prints. The way the packaging was done causing imprinting of the dotted pattern into it. Really isn't the best of packaging for protecting it for looks. Done more harm than good. Most if not all depending on how long this had happened during transit most came out with luke warm water and a soft cloth. Other marks I had to fix up with matte weathering kits to take the shine out from the pressure of the lid to the plastic. The polystyrene isn't soft enough to protect it. It alone is like a firm soft plastic (but not soft enough) in a way causing that rubbing/buffing effect.