So, like I stated above, I sanded down my Roush Front fascia down to the plastic. Why? Because after 12 years of driving,the front bumper was in bad, bad shape. Anyway, all paint, primer, clear coat and if it had adhesion promoter is now gone. The surface is rough as I used 320 grit to get rid of all -- but have a question...should I be applying adhesion promoter before the primer? Or can I apply primer to the bare, but sanded down plastic? Thoughts?