Polishing Plate Processing At Sandmeyer Steel, we're highly experienced in polishing stainless and nickel alloy plate and can provide a standard #4 finish or a 5 RMS maximum when requested. This can be done on all shapes. Stainless Steel Plate Stock List PDF Nickel Alloy and Titanium Plate Stock List PDF Quickmill Annihilator Sell Sheet PDF Associations and Accreditations