Do you want a cover while you're in the trailer? If so, seems like it would be like being in a cave and you would have to be careful not to have a flammable or any cover near any of the exhausts for the furnace or water heater, and not to reduce airflow to the back of the refrigerator or cover the vents for the refrigerator, bathroom, shower, soil stack, stove fan, other fans, or AC if you use the heat pump. With all those holes in the cover, it would not help much.
So far as a cover goes, some people think certain covers are soft enough inside that they will not scratch the aluminum. I believe one kind is Technolon. You want to be very careful to make sure the cover will not scratch it. Before putting such a cover over it, you would have to throughly clean the aluminum and make sure there's no dust on the surface.
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