I'm not a surgeon, but from a general medical ethics point of view, if the person has full capacity, then I'd suggest this sort of extreme body modification may not be a particularly unethical thing to be involved in. To use a tailoring analogy, if you felt somebody would be better off with a clean look, but they insisted on lots of drape, if you were sure they absolutely understood what they were asking for, you might still proceed. Now, if the person had impaired capacity, or serious psychological issues driving his desire to get this type of surgery, and the surgeon proceeded anyway, absolutely I would consider that unethical. I leave it to you/others to suggest a tailoring analogy here, perhaps using one of our esteemed members and their bespoke tailors... Of course, it can be argued whether it's possible to want this kind of modification without having those serious psychological issues, but there is a theoretical possible subset that might fit those criteria. I suppose, in some respects, in might be akin to surgery for body dysmorphia. Not something I approve of personally, and it is a highly controversial field, but there are those who hold that it is acceptable/ethical to perform.