I too will be starting over with new Cetol next spring on the toe rails, grab rails, drop boards etc. However, a pressure wash sounds like a very bad idea. You will most likely end up eroding the soft grain of the wood by using this technique and require a major sanding operation to make the wood ready for another application of Cetol or varnish. There must be a more controlled and precise way of removing this stuff without the "Bigger Hammer" approach of "sand blasting" it off. Some other ideas out there?