the panels in Cimbali machines are metal or plastic. Some light rusting on the stainless metal panels can be buffed out. But for agressive rust and pitting only wire buff wheel or sanding in deep pitting. Light pressure to keep wire bristles from scouring or burning stainless surface. Over pressure will discolor metal. Follow up brushing with solvent wipe and clear coat. Primer and color coat if you want paint. (it's more durable. Pick a color style to match you kitchen (and please the wife)