It would be possible to iron out the scrape from the inside and bring the surface back level. To do this you would have to remove the inner skin and cabinets etc to get access to the back side of the panel. Then sand and buff out the scratch.
This would have to involve polishing the whole trailer for a uniform appearance. And the area still might be slightly wavy.
I would leave it unless you are planning a major renovation job.
Living in the trailer park of sense, looking out the window at a tornado of stupidity.