Used this as a test print for various metallic-look silk PLA. In-person, the metallic look is pretty effective and the puzzle works well.
These silk PLAs need to print S. L. O. W. L. Y. I usually print around 120mm/s, but this filament only does its magic when printed around 25mm/s or slower. The silver part was printed around 50mm/s, and it is a solid piece, but as you can see, the silk PLA failed to bond at various points in the outer shell. I originally tried printing the copper piece at around 40mm/s and it did even worse -- actually, the result was unusable.