while scraping paint off of a wall in my 1906 Pasadena bungalow I discovered a layer of beautiful old wallpaper which was well-preserved by the paint over it, I thought it would be nice to perhaps put a clear varnish over it and keep it as a sort of "Mural"... Any ideas on how to accomplish this???

Try contacting someone at Bradbury & Bradbury (see the Resources section).