Yeah it make take a couple of tries to get used to it. I know that first time you spray it on your beloved car is kind of Nerve racking. You keep thinking I hope this stuff comes off like they say.
It may help to put down a good coat of wax or use some quick detailer before you spray to make sure the surface is free of oils and dirt from your hands. I used a clay bar then waxed and did a quick detailer spray so the surface was as clean as I could get it.
I am going to wait a couple of months and try some white stripes on my Sterling Grey. We'll see how that turns out.