I just did mine and prepped like I did the rest of the car, came out fine, I even had a nice original bowtie emblem that had some scratches on the plastic insert, :yes:and ended up scotchbriting it and cleared it along with the grill, came out great!
Depending on how you feel about it, there are a couple much better routes to go then using krylon, especially if you are spraying PPG. There is the old fashioned way of sanding with 320, spraying a primer down like you would use on metal, i use shopline (ppgs bargain brand) jp 202 primer. Or if you are lazy like i am, there is a great product that self etches plastic, i have used it hundreds of times on bumper covers and other plastic parts. Its called Bumper and Cladding Coat adhesion primer. It is a premixed product that is manufactured by Urethane Supply Company and it is literally spray and you're done. No sanding before, just wipe it down with a quality wax and grease remover. I use it in my body shop on a daily basis, and have never had it lift or fail to adhere. Its the only way i would go if i were you.
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