I have done about ten lids in flat black, it looks really nice done on the outside. Like Rob already mentioned, if you paint the inside black too the scratches will barely be noticable. If you paint the inside silver, it will look like a real vehicle when it scrathes and look like raw metal. I highly suggest using Krylon ultra flat black, (same as the Krylon camo) it adheres very well to lexan and holds up extremely well. When it starts looking crappy, just remask the windows and throw a fresh coat on and you are good to go.