I used products from California Customs. I use the Metal Dioxidizer and then there polish
You have to polish it after each weekend of use. The first time you do it is the hardest. Do it ever Monday or every other Monday and it goes quicker and quicker plus it keeps getting brighter.
The "Powerball" from Mothers does a decent job. If you want it better yet, I use the white buffing wheels with an air tool. It does about 50% better than the ball from Mothers. You can get them at lowes along with the compound.
I haven't tried it before, but it seems to have worked really well. We'll see how it holds up. Unfortunately I did a horrible job putting it on, but you can't really tell without looking close. I also did my rails. It was a little pricey, but goes a long way.
Mine are removed. Johnny law shouldnt really care about the tunnel stickers... they're basically irrelevant to anything he would need to see on a sled anyways unless it was stolen. And even then, I'm sure you could probably buy new ones at the dealer if you're that worried.