Etienne dropped off some sample materials and some test prints here today (thanks !!)
The two "vinyl" like samlpes are not what we are looking for (as Etienne already concluded, but the Alu-looking samples are EXACTLY what we need
We also discussed the font of the Irish serial sticker and both now think the font on that one is not bold...so some more work for Etienne, but I guess that's almost just one button press