It's an interesting idea, and some great looking walnut.
From a design perspective it isn't something I would do, will be dark, unless this is a bathroom in a man cave that isn't what you will want.
Beyond design and aesthetics it is not a good idea from a material perspective. It can be done, and it might be OK, but why waste that great wood, the time, and the effort.
Might post a pic of the bathroom so we could see what you are dealing with.
From a design perspective it isn't something I would do, will be dark, unless this is a bathroom in a man cave that isn't what you will want.
Beyond design and aesthetics it is not a good idea from a material perspective. It can be done, and it might be OK, but why waste that great wood, the time, and the effort.
Might post a pic of the bathroom so we could see what you are dealing with.