3D printing of figures with polishing

We printed this spigot from a composite material. The material is made of thermopolyurethane (rubber) with the addition of glass fibers. The combination of soft rubber and hard fibers gives a resilient material that cannot be broken, due to the rubber base, but is resilient enough for parts with wall thicknesses over 3 mm.

Quality before polishing 200 micron layer, no refinishing
Polishing time 15 min
Drying 8 hours in air
Solvent Isopropyl alcohol
Material to be polished Polymaker PolySmooth (PVB)
Infill 20%
Wall thickness 2 mm