I've noticed that the stock windows have a slight amount of tint to them already, so I'm assuming this needs to be taken into account when doing the other tint right (for legality's sake)? Does anyone know what the amount of tint is in the stock windows?

Then again, maybe it doesn't make much difference since it seems like most tint comes in the standard steppings of 50%, 35%, and then lower all the way down to limo.