Damage to side wall

Milkyway_06 wrote:
....For now we’ve duct-taped a piece of shower curtain over it (I know, I know), but obviously it needs more permanent fixing. We don’t care so much about it looking perfect, but obviously want to avoid rust and water damage. We thought about using pliers the edges as flat as possible, sealing it (with what?) and placing a decal (decorative fake license plate) over it (best way to attach it?).
Or would a shop be able to attach (rivet?) a piece of siding over it? Do they even have stuff that would work, as the RV is so old?
Any input is greatly appreciated!

As has been suggested, I would use some caulking in the cuts or tears. Then cover the area with a register grill something like this -

I would bet you already have something like that on the side of your RV for the furnace, refrigerator, stove vent, etc. :)