I'm here bitch.
Anyways. Just got done doing some things on my car. Grille and rims ;)
Went through like 2 1/2 cans and they came out pretty clean. The more work you put in to prepping, the easier and cleaner it will be. Its simple to do, as long as you dont take on anything too big for what you have. Ex) Dont try and do a whole car with rattle cans, get a paint sprayer.
Its just like spray paint though. Follow the instructions and watch some youtube vids and you'll be golden. Heres some of my car before and after