Some things are just plain hard to do. Some things make you wonder WTF. Just degreased all of the bright shiny metal I ground paint off of. Por 15's Marine Clean is an caustic solution. Directions are to apply it and rinse with water. Gawd, that's hard to do. A puddle of water on those nice shiny pans.
The rinse water was pretty dirty so I guess it did something. I couldn't stand all the wet metal so I dried it off with clean cotton rags.
Dave