The ones on early models (2008 and earlier) lack a anti-scratch coating.
New ones are way better.
I could scratch paints off my old ones with finger nails.
The fronts pop off but for the back ones you need to take the door panel off, as far as I know.
I have an '08 and the ones along the sides of the center console are really bad. Caustic, when you did yours with 3M, did you remove them so you could "wrap around" the edges so you don't see the edge of the 3M?
I assume this is the stuff: http://www.metrorestyling.com/3M-Scotchprint-1080-Brushed-Aluminum-Vinyl-Wrap-p/3m1080-br120.htm