I did almost my whole truck, you should just tape off areas an inch or so away from where you want, you can wait for it to dry then pull the tape at that point the plastidip will peel with it, but it is very good at breaking at creases and other points, its really not to bad.
So for like an emblem i just made like a 3 inch high and about 1 inch over each end box and sprayed away, fenders and things I just put plastic to cover the rest of the truck from spray flying and making those coats look bad.