Here's one I did to scare ND28 on the 626 site. he took the picture himself and uploaded it to the site. Then I reposted it and said I really liked the pic. It kind of freaked him out he had to go back and look at his original picture just to make sure. If that was your car wouldn't that freak the [shizzle] out of you too? :P
Here's some I did to color match my new Mazda 626 wheels (tires are flat because they are junkyard tires).
Based on use feedback I decided NOT to color match my wheels. Just leaving them silver. That's one advantage of being good with photoshop is you can get feedback on changes before putting tons of hours into something just to find out it doesn't look as good as you'd hoped.