Hey guys and girls I recently bought Myself a new grill and I decided to have a go at painting myself so I am going to do the circle bit White like my car then put a black badge on but the arms are going to be gloss black....I sanded it all then cleaned and gave 4 coats of primer to it now the next step is to mask of the sides and paint the middle bit White do I need to sand over the primer again with 1200 grit sandpaper or not? Any help please