This is a classic from the 1970s. When most comic book artists have to depict a reflective surface, they'd just make it white with a few parallel lines as a shorthand to say "this is reflective."
Not Jim Sherman. Note the top and bottom panels:
Jim Sherman was/is amazeballs. And his women were gorgeous -- note Dream Girl's face, and the sneaky little sideboob in the middle right panel. Remember, this was 1977.