A video I ran across that wasn’t directly targeted toward 3D printing, but was an interesting take none the less. This guy has a white, ABS puzzle cube, and uses a mixture of acetone and water in order to dye it black.
For those that are frugal, this might be an awesome way to get multiple colors printed for just simply the price of white ABS and different colors of RIT dye.
http://www.youtube.com/attribution_link?a=B9ThCzbv3JY&u=/watch?v%3Dd272v6G28wQ%26feature%3Dshare
