I know someone else on here recommended this awhile back but I thought I'd throw my 2 cents in. I tried it a couple weeks ago on the whole Element including panels and some interior stuff. It's excellent. I've been using this stuff for eyars on my motorcycle, it just never occurred to me to try it on my E til know. The panels don't get cloudy and it really helps keep the E clean inbetween washes.

2 caveats: You need a little elbow grease to get a good shine and I'm not sure spraying insode is a great idea since it seemed a bit toxic in there after I used it on the dash. However, there doesn't seem to be a warning to this effect on the can.

This stuff costs about $7 a can and I got 2 full applications on me E out of it.