as u have scratch resistant top class paper i would suggest u tint the qtr glass from the outside as its v difficult for the squeegee to reach that small place n usually leave airbubbles. I know a bit about tinting as ive tinted a few cars for frends n family in england in 2009 but it was with cheap paper i took from here. Results were satisfactory with just pass marks. The best tint is achieves by removing the glass from the car n then doing it. As no air bubbles. a professional tint for a BMW/Merc standard can cost up to £1000 in the UK. Imagine that paying 140,000 for just tints. My brother got his rear screen n back windows done for £500 in his BM back in 2005 but the job was a mark apart. Despite trying hard 1 coudnt find where the edges were. I did an experiment after removing rear qtr glass of my better half's mehran. Att the pic for ref. When my family aint here my kitchen becomes my mini workshop in at my flat. There were no air bubbles n u coudnt judge the edges as the glass was removed from the rubber.