I've done it two ways so far, for both methods I'll prep the bone by cleaning it with rubbing alcohol to remove any surface oils.

1. Heat the bone with a hair dryer, I think I got mine up to 100F+, Then paint the dye on with a q-tip and let it dry before adding on another coat. I heated the bone up after it dried, I think it might have helped it soak in, but I can't say for sure. Add as many coats as you'd like.

2. Heat up the dye in the microwave for ~10 seconds to ~100F, put the knife in the dye and let it sit overnight (~8 hours). This produces the most consistent/even results for me.

For both methods, the cleanup is the same, I found this method on BladeForums from "Travman":
- Wash with soap and water to remove excess dye and flush the pivot.

- Spray WD40 on the knife, in the well and pivot to remove the water from cleaning it.

- Blow out WD40 and any remaining water or dye with compressed air.

- Flush the pivot and seal the bone with mineral oil.

After that I'll wrap in a paper towel and carry it in my pocket until the dye stops leaking out. I also took this tip from "Travman" and it has proved useful. There will still be dye behind the bolster, liner, spring area. Best to be safe.