Polishing Out Scratches on a Door

[wolram]

I think that is what this door is made from, the thing is it looks terrible tatty compared to the window, i have tried the usual cleaners the thing is the door has loads of tiny scratches that hold the dirt, is there some way to polish these out?

 

[Math Jeans]

Maybe you could use an airbrush in the cracks?

 

[brewnog]

Stiff nylon brush and some elbow grease.