Hello, thanks for the interest in this, it's some small way I can give back to the site, so thanks for asking..

The dye on my fingers came from the plastic container of dye... someone (probably me) spilled some on the last project, and got on the jar and wasn't wiped off, so there it got on my fingers.  Plus applying it a drip or drop happens in the sink and you'll be cleaning it with alcohol pads or face a mad wife...  So it's messy stuff unless you have a space set aside with newspapers, etc.

I also combed the bow with a clean toothbrush (the same one used in application, but cleaned with alcohol).  Brushed it out a few times and dried the bow hair using the light/fan/heater in the bathroom ceiling.  Probably should have let it dry 24 hours or something if I was doing it for someone else.  Today I rubbed it all over a white paper towel and there isn't any green on the paper towel.

Applied the rosin as usual and nothing unexpected happened except on the chipped side of the rosin cake where it hit the metal keeper, chip was predicted by FM on the "How to Rosin your bow" video.  Some very slight green spots on that chipped section, but only when the bow hadn't dried fully overnight.

No green anywhere in the house and my fingers are back to the normal color, I washed them with alcohol pads and etc.

I think that the color is rather permanent.  The rosin powder if I bump the bow, comes off white (I have light colored rosin).  The bow performs as good as it did before, but may a bit smoother since I had cleaned off the previous caked rosin where it had glumped from poor application techniques.

Other than that, my 5 year old likes it better than the old color, and my 11 year old thinks she might like to play the violin if I make her a pink one.  My fifteen year old thinks it's "cool" (that's saying a lot!!)  It's not true green because of the slight color of the hair before staining.  If I bleached the hair white beforehand it might have come out different, but am unsure what household bleach will do to the properties of the hair.

I would be happy to send you the half bottle of the dye (my wife will also thank you for accepting it so she can get it out of the house), though it could be messy and I warn the use of rubber gloves when handling the bottle.  I had a green thumb and forefinger right after application and used the rest room, now I have green "certain other places" too.  But after 20 years of marriage the wife was more concerned about the green bathroom sink.

Well that's all I can think of... yes the green color is there to stay but is affected by the light powder from the rosin, so it's got a fading in/out look as far as the whole length of the bow goes.  Time will tell if the color wears out after a while with vigorus bowing, but I don't think so because he strings are actually sliding/sticking on the rosin which serves a buffer for the actual hair. [?]

Off to more practice with Ash Grove, and of course now Angelina the Baker.  When do I get tostart with classical peices?, how about after I master the basic skills to play these two with some basic beginner competence.  As for that, I'll leave it up to you guys after you see my properly practiced attempts!

Mr. Fidder. (ps. no work tomorrow for us... more time for violin!