Evaporust is available at Harbor Freight in Olympia. I'm not sure that it's any better than naval jelly though. It will turn metal dark as well. Most do. Most rust converters work by turning red rust into black iron oxide which is basically inert.
Please bring your machine. I haven't seen one in person yet.
Alcohol dissolves old oil but it will destroy your clearcoat and decals. Use cautiously. Better yet, remove parts to clean them.
Rodney