u/Careful-Survey-4108

Hello auto body specialists. I recently bought these lips for my track car and they need a little work. How should I prep for paint? And do I peel off the paint from where it’s cracked? What grit sandpaper do I use for sanding? It doesn’t need to be perfect since it’s for my track car but I would like for it to look as good as it can for as cheap as possible. Also fyi the black one is one I painted with a spray can to see if the color was close enough to my cars color. It’s wrapped so I will be removing the now black wrap and the lip itself is orange underneath.