How to use "edges" in a sentence

They looked and acted like organization men, even though the big one was rough enough at the edges to pass for a common thug

Several blocks to the north, an ugly column of smoke rose into the twilight sky from what was left of Tina's house, roiling, night-black, the upper reaches tinted around the edges by the last pinkish rays of the setting sun.

It was covered with a thick burnt skin, which softened its edges