Great pictures, Kifcog!
I too have tried making something to put over the lens to shoot through to eliminate the dark reflections from the camera when shooting shiny coins straight down, but never got anything to work very well so I just shoot at an angle. I use the smallest angle I can and hold a piece of card stock just above the lens to block the reflection of the camera body. Thanks for the pictures and the shooting tips.
Model Citizen - Zero Discipline