Hi BB, after all the mess and time taken with the molasses solution, I shall try a simple electrolysis set up. It has been very interesting starting this discussion.
I will retrieve the fasteners next and apply clear asap.
Good advice NK, a less agressive grit is a good idea. My best work has been with wet sanding. It's much smoother and faster, but I've always been concerned about moisture getting to the metal that way and not drying properly before applying paint.
