if you are going green, you won't need to sand the green off the overlays.
follow this how to and you won't have any problems.
i just did mine using that and this is the result.
I'm still working on the hvac panel. the only advise i can offer is to take your time. i had to go back and add some more leds to the cluster and the hvac panel. i bought 100 leds and resistors off ebay. paid $10 shipped for them. do it like the how to shows, test it, then add or adjust as needed.