I am just on my way to get the trailer inspected, it's a 78 Argosy Minuet 6 meter and it sat in a Pecan orchard for 6 years. It needs some TLC and I was wondering what/how you painted your interior? Did you strip the old paint off? Did you clean/scuff/prime?
Personally, BTW, I like the idea of a solid backsplash. Brushed aluminum or maybe even a faux-brick pattern in vinyl? My wife put some kitchen wall paper up in the house we are renting ("FO" stone in light gray) and it gave a lot of depth to a small space, so you may want to check out some patterns, etc. Do you have photoshop? It is great for doing this kind of stuff. I have a brother who is a sheetmetal whizz, so I will ask him to make us some brushed stainless steel back splashes.
Thanks! Please keep posting, I'd like to see what you end up doing.