My quick design for a open bottom gadget works pretty well. The scans I am getting are very consistent as long as I don’t move the device. It holds the scanning distance to a constant and I know I won’t smear the sensor with a slight bump.
I printed this gadget with white ABS plastic. The provided cup is really interesting to look at, there is a reflective surface on the sides and white? on the bottom. This surface looks very golden to me but polished copper could look very similar. What is it?
There is a paint that will dry to very close the reflectiveness of either gold or silver. My other option would be to use aluminum foil to coat the inside.