I was planning on tinting my silver cayenne and was wondering what brand anyone used. I was thinking 25% on the back and 35% on the front.

 

That is exactly what I did on my wife's Black Cayenne. It makes all 7 window look like it has 35% tint on them. The front windows are a little dark for the California. The law here is no tint on diver and passenger front windows. But we like the way it looks it and have not had any problems.....knock on wood.
I do not remember the brand of tint. I can tell you it not the metallic type. It was the standard 3 year warranty tint.