I bought a used duster off of ebay and it had acted like it was just thrown into a closet. Likely not been worn more than a few times. It was stiff and dry with a bad smell. After letting it soak in a bucket and treating it with the dressing it came back around like new. Took pretty much the whole can of dressing with a lot of time to put it on but it did a good job of putting the duster back to where it should be. Now it's like a new duster again.