Ash is a medium-hard somewhat heavy wood with an open grain structure. This makes it a bother to finish, but the striking grain patterns under a clear-coat are well worth the effort. Otherwise famed as broomsticks and baseball bats.
Cabinet-grade plywoods are ideal for guitar faces. Maple, birch, oak, and many other woods are available from your local home supplies store. For hollow-body faces, 1/4" plywood or thinner is used. When using plywood for faces, you must take care not to sand through the surface ply.