I really couldn't find anything about it.he is very tall, a musician, a mighty singer.He is never called an exceptionally fair or beautiful guy anywhere in the texts.Only in the etymologies where he has the name "Maitimo" "shapely one" for his "comeliness", Russandol for his copper hair and maybe skin and well, Maedhros is translated as "pale glitter" , could refer to his hair, skin or eyes, but i presume eyes.
Based on this i'd say he is probably not an exceptionally good looking guy by face but possibly just has an athletic look and is , well "nice to look at".Maybe he has a very sporty upper body and likes to show off... who knows?