987Ron

Can a dye or food coloring be mixed in to get a bright color that contrasts with the wood?   Like the dots on LBD's Dice Puzzle.    I.e.  bright red, yellow, green etc.   Maybe to show a colored line that contrasts.   

I'd suggest something like Mixol.  It's a pure pigment and won't affect the epoxy significantly.  

Also, I've been using System Three epoxy paste quite a bit lately.  It's easy to work with and I get good results with it.  

If you use any other products besides the Mohawk shown above, the 20 to 30 minute period might be off for when it's gotten to a state where you can carve and plane it.  What I like to do is keep a little of the epoxy I mixed for the fill on the side and monitor its progress every so often until I think it's ready.

Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner