I've had my rims, side mirrors, and roof plasti dipped for almost 3 years now. Its been through multiple Michigan salt filled winters, and they still look pretty darn good. Plasti dip is a perfect low-budget solution to get some custom looks. It comes in a spray can, and essentially all you have to do is spray it on (light coats).
The thing with plasti dip is that its just canned rubber. So when you're applying it, you have to have multiple coats. If you do not apply multiple coats, you will have the WORST time ever trying to remove it. The thicker the rubber, the easier it is to remove. For my rims, I used about 1 can per rim, and applied 2-3 light coats to the rims, letting them dry for about 20 minutes in between. Then I followed that up with 3 more heavy coats, covering the entire rim with a nice thick coats, letting them dry for 30 minutes in between. Now I went from black, to red, then back to black on my rims, so I have about 16+ coats on them lol. So they are very durable and will be very easy to remove. As for my roof, I only did about 6 coats, and I plan to peel it off this summer, so we will see how it goes.
As far as care goes, be very careful about running your car through a car wash. It HAS to be a No-Touch car wash, otherwise your dip will get ruined. I've been hand washing my car for the past 3 years, because I'm too worried about my dip getting ripped off. Also, if you do get a rip or tear in your plasti dip, there is no patching it. You have to peel it all off and start over. So be careful!
Now when I first got my car, I plasti dipped my emblems and spoiler, but didnt put enough coats on either of them. When time came to remove the dip off my spoiler, it was a complete nightmare. The dip kept ripping because it wasnt thick enough and it took me a few hours to get all of it off. But now they have a Dip remover solution that helps loosen it up.
I think plasti dip is a great way to customize your car if done right. I loved it for the time that I've had it, but I would like to move onto Vinyl wraps. If you have any questions at all about plasti dip, feel free to ask away. I would be more than glad to help answer any questions!
Here is a current picture, along with some previous pictures of my red rims.