I just finished painting my Givi. Bottom 2/3rd Satin Black along with silver parts and front fender.Came out perfect. I have done this combo to other bikes I've owned and in really cleans the bike up. My tape seam came out perfect on my windshield. My only thought is to run some red trim tape along seam or decal or leave as is. The bike looks outstanding. My only advice is to not paint entire screen. Trust me.
I just got my 2007 (new) Black Versys this morning. After checking the windscreen tinting it with film was not a solution, there's some embossed print inside the windscreen so it would probably come off in days. So I went to a car paint store and bought special transparent primer and custom mixed tinted clear coat. If you do use this technic, make sure to read the instructions. In my case it was only 2 minutes between the 2 primer layers, and then let it dry for 5-10 minutes maximum and then start the clear coat layers, with 10 minutes between each layer.
Ok here are a few pics: As you can see the windscreen is not transparent like if a film was used, but it will be more durable and with a windscreen that size you usually don't look through it when you ride. Total cost: about 25$