Could well be there is substandard material being used in some kits. I also made sure the surface was clean and smooth, used a curling iron to "wipe" the edges where it was wrapped to help it wrap, and touched the corners with a dab of clear nail polish to seal it (altho it went two years without any delamination, just did it for added protection). This is the only pic I have here at the office, and it's from when I was putting the car together, but it looks perfect still. I have since done my center radio piece to match, altho the layman would not notice.

Make sure you get a GOOD quality clear. Some will yellow after a short time...and use that polish remover at least 3-5 times first, or you will get major fish eye.