I may be a bit late, but my experience with vinegroon and finishing the edges has been a fairly good experience.
The smell is still there definitely but not as strong once applied and rinsed with the baking soda/water mixture. When the leather is just about dried and it looks grey/dark blue I than coat with mink oil along the entire peice. As for edges like any other of my projects I sand them down, than with some gum trag I start to burnish and finish off with bees wax, the edges look sharp and clean. One of my project was about 4 layers of 4-5 oz vegtan and it came out great. Mink oil every now and then keeps it looking fresh!
