Sounds like you will have great fun with him. It is better when you have something that you know you can handle and pull up when you want to!
Ah -the grey! Get a mortgage out for blue shampoo, we have a large tub of the Wahl blue shampoo and it is very good, although I think that my cob is stained on his back legs and it will never come out until he is clipped or moults.