Adding saw dust to the epoxy will always come out darker than the original saw dust color, it will look permanently wet. Use mostly the silica for thickener if needed and just a small amount of saw dust. An alternative is just silica and dye powder made for the purpose. The saw dust does aide in improving sanding properties.
Probably not a concern, if it is too dark just leave it in the sun till it matches.
Try a a few test mixes as the color can change when drying. But those checks are so small it shouldn't be a problem. I do agree on doing this before profiling as no telling what is underneath so better prevent any chipping than to find out later.
And post pictures, that is an outstanding piece of Cherry.
Last edited by Tejano; 07/25/14.
