Many shops want to remove previous tint due to quality and money.
50% True. one of the biggerst faults to double layers is the quality of the first layer. if you have a scratch on the first layer...it will stand out 3x more when you add the second layer. The money portion is not that big of deal, cause like someone has already said, they will just charge you for it anyways. Also, when you add a second layer, it obviously increases the thickness of tint on the window, which increases the opportunity that you window seals will peel the tint back.
Also, most new films are metallic based. Which do not fade. Older tint is dyed and it will fade, that is the tint you see on cars that is basically purple instead of black. I recommend having any dyed tint pulled off anyways.
75% True. while most new films are metallic based and older tint is died, new films can fade just as much as old films. the only difference is, New film wont fade from direct sunlight like older tint. If you clean your windows with, lets say, Regualr Windex / Amonia / Alcohol, this breaks down the metallic film, cause the tint to fade. However, Windex does make a special brand of window cleaner that is "Tint Safe" you can normally pick it up in the Automotive section at your local wal-mart.
People that have double 5%, are basically rolling with paint on their windows.
100% True...and i F***ing love it.
I have 35% on the windshield, 5% on the front two doors, double-layer 5% on the back two doors, and 20% down the back glass (for more visibility at night)
Andrizzle, not attempting to say that you are wrong by any means, just wanted to clear things up a bit about the subject, to have more of a professional view on things, from a Window Tinter.
