Yeah thats the lazy unnessesary answer. Show sheen is your friend. Use your fingers or a brush. Just start at the bottum and work your way up.
Its not a show horse. The hair WILL grow back. She asked for opinions, I gave mine. Just because you don't like it doesn't mean its not a valid opinion. Sorry I don't have days to brush out one mat on an incoming horse's tail. Lazy? Unnecessary? Hardly. I had one horse that came in with a 3 foot long club that used to be a tail. I cut it off. Literally, this thing was a mat 4 inches across, 3 feet long, and had the ability to be used as a baseball bat, it was that hard and stiff. It grew back fine, a year later horse had a nice tail again.
Its just hair, it will grow back.