I experimented and made some background papers by brushing Grumbacher Linseed Oil on vintage sheet music pages.
I put a heavy coating on the top two sheets. I prefer the darker color of these papers. However, the papers took about four days to dry. I brushed a lighter coating of oil on the bottom sheets and, of course, they dried much quicker. To prevent a mess, I put the wet papers on wax paper.
The addition of the oil to the pages makes them much stronger - an advantage for fragile, thin papers. I think I may also try brushing oil on scrapbook paper to create a different look.