I have the 3M Crystalline CR40. I don't have any circles anywhere including the back window. However the tint guy did warn me about issues with the back window of mustangs can be an issue sometimes. But he said when he was done it came out perfect on the first try...but I paid stupid money for...
Actually, I spoke with Auto Meter a few months back about fitment for our vehicles. They told me it was in the works but it needed to be tested and approved first. I'll repost the email if I still have it.
Yes, it showed up later on...almost like something coming through the paint. They did check and it's clearly something that is underneath the clear coat coming through....
So I have this one spot on the driver side above the 1/4 window that is like dirt under the paint. It's not a large spot but it is clearly noticeable! (I will upload a picture as soon as I get it back from Ford) Basically they are telling me that Ford has authorized the repair for the paint...
I actually have one that's not on the bumper its brand new. I bought it before I purchased the bumper with one on it already. I would be willing to let that one go...I paid the ford price for that one..let me know your offer.
I wouldn't want to mislead you, it is not Plug and Play it requires some work. there is a thread about it in the interior section.
http://www.mustang6g.com/forums/showthread.php?t=38818
First of all, everyone mods their vehicle at their own risk. The forums are here as a guideline/research/help and none should be held responsible for anything you do to your vehicle. I have been following this thread since the beginning and I have honestly just waited until clear cut answers...