To be effective, make sure you use mothballs that list paradichlorobenzene as an ingredient.

The higher the concentration of peroxide and alcohol, the better.

Lay them out flat on paper towels to dry. If boiling loosened up any unidentifiable gunk on the quills, wipe them gently with a soft cloth to remove it.

Don’t hold the feather right up to the blow dryer’s stream. Hold them a few inches back so you won’t warp their natural shape.