Good idea!
I am sure you can get the magnetic vinyl background in a color that would be a close match to the Argosy color. As far as I could tell my Minuet never had WBCCI numbers on it but it did have some Good Sam stickers which left very obvious traces, no paint and some rust patches. Now if there was such thing as a magnet for aluminum we would be set!
BTW, I still get to see it, my Minuet, it is sitting in the couple's driveway exactly where I delivered it, I guess they are still using it as an office
Chas