Armageddon Riders

Skins are basically paint jobs for your car, each car has around 4 skins (paint jobs) and there are 8 vehicles to obtain. Skins are collected by destroying marked vehicles in sandbox mode. Sandbox mode is basically while roaming around the streets as this allows you to cruise the streets while not doing missions. The marked vehicles are the little Pink arrows on your map. Chase them down and smash into them to destroy them and attain that skin. Remember you can only obtain skins for the car you're driving when you crash into a marked car. So make sure you're driving the car you want a skin for before hunting down a pink arrow. After you have destroyed one, another will appear until all skins have been attained for that vehicle