Tar Wash, anybody use it?

I'll be spraying our new fruit and almond trees on the first dry day and our acer tree in the front garden.
On the subject of protection, as well as the bubblewrap around the pots I've put "cosies" on our little lemon, orange and olive patio trees and on a tortoishell rhodo which we bought at half price last year, as some of the huge buds had frost damage.