When doing something like that, I've found it best to do the sides of the body first with the dark color. You can let it overspray a little on the edges of the top and back, it wont hurt since its gonna be bursted anyway. If you screw up, and get the side color where the top color should be, no problem at this point, just sand it off. Then do the lighter color on the top and bottom, since its transparent, you can bring it almost to the edge and any little overspray is not noticed on the sizes - if the colors are compatible. Then you go back and add the burst finish to the edges of the top and back. You'll have to contend with natural binding, but... that just requires that you lay down some clear, add the tape, and shoot over it. Remove tape after the color coats, and shoot clear over the whole body. The reason you shoot clear UNDER the tape first, is to make a better seal and in case the color does run under the tape, you have something to scrape back - it doesn't go into the wood itself. Clear over everything, and its all sealed up and lookin good.
So keep in mind, no dye, just a transparent light color and semi opaque darker one.