Trailer wall look like marble repaint?
Need more information please.
I'm not sure what you're asking. If it's whether to paint over a marble look, I would say yes. I don't think it ever really looks like the real thing. If it's the formica panels, you'll need a certain kind of paint.
If you mean you want to paint a trailer wall to look like marble you might find this tutorial with video helpful.
See the previous answers, in the previous question you posted
How big is the wall? I wanted a marble look for a backsplash, so I used contact paper. It looks great!
O gp along with the contact paper...it is great stuff and not difficult to work with