Some comic books provide
the only note of color— (21-22)
This is pretty grim, too. But our favorite part about these lines is the little hint of synesthesia going on. She describes the comic books as a "note" of color. That makes us think that this filling station is a pretty quiet place, just like it's gray and bleak.
upon a big dim doily (24)
Even the doily is colorless, and seemingly lifeless. To be fair, it's probably pretty oil-soaked. But why hasn't the family taken care of it? Could the woman who's responsible for placing the doily on the table be gone?
a big hirsute begonia. (27)
There's a big bushy plant on the porch. This might be the only thing the family has that hasn't been described in a completely disgusting, negative way.