I haven't tried to Rit dye any G10, but after seeing the red one, and now the blue I think at some point I'll pick up another PM2, and give it a go. I did Rit dye my Orange Zytel Becker BK14 scales using dark green rit dye. I boiled the water, then added about half a package of dye and a few pinches of table salt, but I did not continue the boiling process while the scales soaked. I submerged the scales for about 5 minutes (checking the color every few minutes) and they came out a nice Root Beer brown color, that almost looks like real wood. I don't recommend using salt on the scales unless the are off the knife and by themselves. If you are not going to disassemble the knife, use the vinegar.
Side note: During the process, I noticed one of the scales looked like it was not going to color as dark as the other, so, when I got the color I wanted, I removed the darkest one from the solution. The lighter one I just left it in the solution a bit longer and it turned out fine. I figured out that if I stirred the solution periodically, the dye moved around more and I got the color right.
This is the only pic I have of the 14 with the brown scales. Sorry I don't have better.
I also Rit dye'd a Coyote Tan nylon Becker BK16 sheath using Black Rit Dye. It turned out OK, but I had to soak it for a few hours. It was jet black coming out of the solution, but when I let the sheath dry, then rinsed it with clean water, until all the dye that didn't adhere to the nylon was out. A lot of the dye washed out, but the dye that stayed in turned the sheath a very very dark chocolate brown. I liked that look better than black, and it has stayed brown.
Learning note: I should have used leather dye on the sheath instead of Rit dye. Also, now that I think about it, continued boiling might have worked out a bit better, but anyway...
Pics of the sheath process and finished color
