elegant

clean, decorate, paint

exterior of
the exterior of the building

behind an/the exterior
Hidden behind a plain exterior is a wonderful hotel.

on the exterior
There is an abundance of fine sculpture, both on the exterior and inside.

calm, placid
Her calm exterior hides very passionate feelings.

cool, icy
bluff (BrE), gruff, rough, tough

belie, conceal, hide
His bluff exterior belied a connoisseur of antiques.

behind sb's exterior
Behind his cool exterior lurks a reckless and frustrated person.

beneath sb's exterior, underneath sb's exterior
Beneath her charming exterior lies a very determined woman.