Schematics are in Beitmans 1950 page 80 and 1951-91 and in Sams Photofacts 100-7. There was a good discussion of electronics considerations for these types of radios in the thread viewtopic.php?f=6&t=205388
. I don't have that particular set, but similar sets had cabinets made of a combination of painted metal and styrene plastic. There is tons of info on cleaning and polishing techniques in the cabinet restoration section. A picture and some more information would help us be more specific.