yes just paint them from the back,no sanding required. i just cleaned the back of the trim with water then wax and grease remover. i just used 4 light coats of gloss black paint no clear needed.

 

Wanted to do this to my new Harley Tails I just got. I bought them used though and they were fairly dirty. I've cleaned as well as I can, but just checking to see if this is still a good option if I can see dust and residual dirt in there? Is there a way to really clean back there? If not, anyone have a better alternative? Should I tape off and paint the fronts, tape off and nightshade the fronts? Thanks!