I recently had a close encounter of the dirty kind with a newly placed piling heavily coated with creosote. I managed to get the creosote off using a variety of solvents (the orange citrus stuff worked very well), but all left behind a brown stain. A friend suggested acetone, but that doesn''t seem to work well, at least not as well as he suggested it should. Davis FSR is a little better. I''m not sure I want to try some of the tougher cleaners like Spray 9. Has anyone got any advice for me? Thanks in advance.