This is my favorite tail wrapping video, I always put my guys up like this, and it really helps grow a tail.
How To Put Up A Tail - YouTube
Remember, white vetwrap for light tails, and don't do pregnant mares with red, you will give yourself many heart attacks, ask me how I know.
I only have blue vetrap at the moment. I think I'll risk the color rubbing off since show season is still months off and give it another try!