I think you should look into sheet tint instead of spray tint. It's difficult to get a really good looking consistent coat with the sprays, and if you don't like the result it's really difficult to undo what you did. Meanwhile, there's lots of time spent putting on masking or removing the whole light piece for setup. So while applying sheet tint takes some time and care, I'm not convinced it's any worse than doing spray, but it is much more easily removed, and it will almost certainly be more even then the spray would have.