I tried to tint my stocker using VHT Niteshades. That was the plan anyways. The valve sputtered and I ended up using that stuff to just black out the windshield. It looks good down but all the way up I can't see right in front of the bike. I ended up buying a tinted shield.
I used some black paint I had in the garage. It took about 6 coats to get it to stick good enough. Mine is cut down so short it doesn't really affect my vision at all.