Polished surface:
Both Woodstab as Techstab can be polished to high gloss: Machine Sanding Grit to 240, then hand sanding -> 400 -> 800 -> 1200 -> 2000, preferably with water as a lubricant release agent. Then polished with polishing agents for soft materials. It is important that you only polish with soft polishing discs and only slightly.

Silk matt finish:
For a silky smooth surface sand to grit 240 - 600 and apply a thin layer of hardening oil.