after I sanding - priming- resanding and repriming I pray it with gunze 156-super white and thin with Gunze Leveling thinner ,Mr. Retarder Mild in 5:5 ratio

for bumpers I sand it till it smooth enough then I paint them with gloss black. wait untill they dry and paint the Mr. Color Plate Silver

I cut the detail at front door, drill and put Mecha Skunk Straight tube 1mm inside for more metal look