The whitening powder is just a cover up used for the show ring aka chalk. I would not use a whitening shampoo with blueing, as most are, but rather use and enzyme shampoo that will work to remove the enzyme stains as saliva. I use E-Z Groom brand whitening shampoo. But it is best used by following the bottle directions(with hot water).
A properly groomed Westing is not clippered but rather pulled. Clipping the coat destroys the natural harsh outer coat. They are a double coated breed with a soft dense under coat and a harsh outer coat to protect them from the elements. They like most of the smaller terriers, were bred to hunt below the ground.
If you want to have real fun, apply for a ILP number from the AKC so that you can do Earthdog trials. If you were in my area, I could help you with grooming and point you towards Earthdog events.
