dog groomer here,
first the skunk off is great, its a squeeze bottle that you can keep around and keep appling as needed, as every time the dog gets wet for a long time that smell is on it,
however also, there is a home recipe, of 1tsp dawn dish det,(as it is an oil that skunks spray) and
vanilla extract, peroxide mixed in water and use to sponge on like a dip, bathing the dog in straight dawn isnt really recommended however a tiny amount will do wonders to cut the oil down a bit.
and can i say, nothing reallly works! short of a long haired dog getting shaved down and still smells,
it is what is the best cover up..lol