Alright, just for the future edification of anyone that may stumble upon this thread...
I'm well on my way to hating this stuff.
I haven't found it particularly difficult to work with when simply "dyeing " a single article black. Neutralizing seems easy if it's actually working. No easy way to tell.
I cannot take the smell though... I've used the stuff fairly sparingly but wow... It's so gross I'm tossing it. If it wasn't so rank, and I knew for certain that it wasn't damaging the leather, I'd use it, but yeah, it's disgusting.
I went ahead and dyed the whole sheath black because the stuff migrated to the tan area while giving the whole thing a bath. I'll post pics later.
The sheath doesn't actually smell, but using it certainly does.
Here's the thing... I really enjoy the smell and textures of working with leather. I realized this last night as I was using some neatsfoot and gum trag. Even Fiebings dye is not unpleasant for me. Weldwood drives my wife crazy, but again, it doesn't really bother me. Vinegaroon does. In a big way.
I'm actually bummed about all of this because it simply works far better than dye (for me), but I really gave it a shot. I tried to get over it, but I can't. Not with the obvious downside of taking away one of the things that I enjoy so much about working with leather.
I'll also concede that it's more work than dye. Obviously buying pre dyed is the way to go if you are using a lot.
So that's about the long and short of it. I've found from my own experience that this is not the right stuff for me. Bummer.
Thanks for sticking with me through this guys. If anyone is curious about it, I still very much endorse trying it for yourself.