IMHO You will not be happy with wood in the long run,use the metal, SS prefered ,or brass if you like to polish. Wood is even a higher maintenance and gets rough with time, looks shabby quickly,and even gives a few splinters in the ole arse when you bend down. Doesn't feel good to soft wet hands either. Even with epoxy finish the water has a way of getting underneath and causing unsightly black spots and eventually bubbling up the finish, When I was a youngster we had cedar bathtub and many a splinter had to be pick out of my little butt after my monthly bath.LOL
OK. You have convinced me.....I will use metal. Bet you wish you had that cedar tub today.....make a nice ornament or planter.