Thank you for the advice. Hot water is a little hard to come by at the site, and wouldn't stay hot for long-but I will try it. So far, we have tried everything from Murphy's Oil Soap, solvents such as turpentine, more Landark finish, pads such as Magic Eraser and brillo pads, brass brushes, and Simple Green. We have not tried hot water and detergent (that I know of.) I will take up a bucket of hot water and liquid Dawn and see what happens. The car deck ceiling has water spots here and there from the rain, as do some streaks down some beams. Maybe the detergent will help there, if not, I am going to try some Tide next or some cleanser unless someone tells me that is a bad idea.

Patty