Sasha, this is amazing stuff! Thank you for sending this link. I thought about doing a double layer with acrylics and foil but your idea with just backpainting the acryl is simple and great! I wonder if the sprayed surface keeps fixed, can you recommend a spray? With a laser, I think, you can also create buttons with coloured small sized text. Do you have some assembled rings ready to show some photos? Those rings are multiplex controlled, aren't they? So something like a BCR2000 needs a hell of 74HC595 chips... Best wishes, Frank