Figured I would jump in here. Thanks for the kind words above.
Dave, as far as adhesion you should not have any problems. I've had one on my 69 Chevelle for about six years now with no issues. I suppose if you take a wet sponge to it once a week or something there would be some problems. For me all that touches it is a duster.
I've done a lot of these various emission decals for my customers with different engines and cars. One customer actually asked me to laminate his which I was glad to do. However, in my opinion, it would just not look right.
Another note for the Z/28 emission CF decal (which is not yours Dave), they had three different styles for the Z and I only do the most common one.
Having said all that, I do notice a problem with the CG decal (the one you have Dave). I went back again today and reviewed all the pictures of originals I have on file. There should be an "underline" under the word "each" on the sixth line from the top. I will try to get that corrected and, if I can, I will send you a new one. Also, I'll send you a laminated one as well and you can decide which one you want to use.
Below is a picture from my website showing comparisons of this CG decal.