We used nikkolite a long time ago. We didn't care for it because it was very brittle. I understand it has gotten much better to work with, along with being more competitive in pricing. The vendor where we used to get it no longer carries it, cause he said everyone back then was complaining about it.
It might be time to try a roll and see how it works, but for us right now, we're OraCal and 3M users in reflective.