Window films

[stratosTRD]

Hi to everyone. Now that i've started my project(if you have noticed at the appropriate forum, i'm thinking of window films.
Do you have any idea of the best brand?
In a car of a friend with window films (i don't remember the brand) i noticed that when i was sitting inside and looking out from the drivers window at a certain angle i saw like colorful watermarks...like when you drop petrol in a pool of water.
Any ideas?

[alimonos]

3Ms are the best ...

[Red]

You can't go wrong with 3M. Lots of cheaper brands will look purple (instead of gray) or start to peel and bubble after a year or two in hot sunlight.

The "petrol in water" sounds like an effect from the adhesive, or the film, not being quite uniform in thickness. Just like the interference sheem from petrol on water.

3M also makes a lexan film (Solarshield?) which makes the glass much harder to smash through. Usually sold for building windows not for cars, but works very nicely.