Not in an Eriba exactly, but in our previous teardrop we used vinyl sheet used for signs. It available in every colour you can think of and can be cut to cover any flat surface i.e cupboard doors etc. Was on the interior and exterior for years and still looked like new.
I guess you could do complex curved surfaces if you use automotive wrap.
IMG_20200712_104240.jpg - Bild entfernt (keine Rechte)
IMG_20200712_104252.jpg - Bild entfernt (keine Rechte)
It's the same film (light blue) on the outside of the white van and on the cupboard doors. Sadly I don't have any better pictures. Just an alternative to painting.