Haakon:
I understand your point. As far as Oracal 970RA, I would just suggest to a customer to use Oracal 751. People put Oracal 651 Polymeric Calendar vinyl on vehicles all day, but......your not suppose to. First, it's calendar (it WILL shrink over time), secondly it has permanent adhesive. So, chances of damaging the paint after removal (2-5 years down the road) are much higher. I would use the Avery Conform Chrome, depending on how thick the strokes are on the lettering. If I used the Oracal 352 Chrome Mirror, I would tell my customer not to expect more than 2 years out of it, especially in south florida.