The antonyms for the word "more rough-hewn" would be "smooth," "polished," "refined," or "elegant." These words describe a surface or texture that is even, sleek or finished, the opposite of rough and unrefined. A smooth surface is polished or buffed and has no bumps, grooves, or knots. A polished look is neat, well-finished, and aesthetically appealing. A refined object or design has been carefully crafted and has an elegant appearance or is tastefully done. An elegant object or material is refined, sophisticated and has a quality of gracefulness. These antonyms describe the opposite of the raw, unprocessed texture that rough-hewn is known to have.