When restoring a razor i like to keep the looks as original as possible. Most my razors are old so the scale material i've used is horn or bone. I've used celluloid as well: i have several celluloid scales from old broken blades, just waiting to get back to service.

For some reason i do not fancy wooden scales. Maybe i'm just too careful, but i do not like the idea of water touching wood. I'm little scary for the hard coatings like CA on wood also. Have some not-so-nice experiences with knife handles where hard coating showed out to be very slippery when wet
Still have to admit that some wooden scales i've seen look really beautiful.