over a year ago:
Dean was seen using a crossbow were not sure if it was from the Impala or lent to him by John. I dont remember the episode in which it was used.
The Colt 1911 nickel plated gun is Deans favorite.
The Taurus 92 is Sam's favorite gun.
Salt is a good answer I never thought of it.
Some secondary weapons we might consider are: Holy Water , Borax , Wooden Stakes.