Soaked sanding may help reduce heat buildup and increase the daily life of your sandpaper. You can use drinking water, oil, or a specialised lubricant to help keep the area moist even though sanding. 304 stainless steel looks better after a while. It resists tarnishing and discoloration, preserving obvious elements https://www.madanijayateknik.com/service/detail/as-round-bar-plate-sheet-stainless-steel-409-409l-409m-409cb-409ti