Quoted from Brich:
Finally found a source for the "twinkle" effect film on the Future Spa backglass!
Looks perfect when lights are in motion. Local dude helped me source a small roll, I will be cutting some sheets to size, anyone let me know if they need some, I can list some for sale in the marketplace as well for anyone else that is looking!
I'll probably need one of these, I've been messing with a future spa restore/customize on and off for a couple years now and don't know if I have this or not on my backglass (I boxed it up).