How to polish raw stainless steel?
There are different ways to polish raw stainless steel to the mirror surface, but all these ways require three stages, including rough abrasive grinding stage, polishing stage and buffing stage. Here we have listed a way to polish raw stainless steel to the mirror surface step by step using a bench grinder.
#1—Rough abrasive grinding stage-polish raw stainless steel
Start with a grit 80# abrasive flap wheel, grind and sand the item. Change grit 80# flap wheel to a grit 120# wheel until the sand hole on the surface of the item are only the size of a needle tip. Then using grit 240#, 320# and lastly 400# wheels. Each finer polishing step should be cross-polished 90 degrees from the previous process, and make sure every line from the previous operation has been taken out before you continue to the next step.
#2—Polishing Stage-polish raw stainless steel
Start with a hard treated sisal polishing wheel, attach the sisal wheel to the bench grinder, apply the black polishing compound to the sisal polishing wheel. Polishing the item with medium pressure and 90 degrees to last sanding process. The sisal fibre has natural cutting properties, and dip treated makes the sisal wheel more aggressive. It is very important that you remove orange peel, grinding marks and scratches left from previous abrasive operations and leave a uniform finish.
#3—Buffing Stage-polish raw stainless steel
Attach the colour stitched cotton polishing buffing wheel onto the bench grinder, and apply green polishing compound to the colour mop. Polish the item with medium pressure. This step will remove dull finish left from last operation, and leave the workpiece with a semi-bright finish.
Change the color stitched cotton buffing wheel to a white loose fold cotton buffing wheel, and apply the white polishing compound to the loose fold cotton wheel. Buff the item with light pressure, this will leave the workpiece a bright finish.
Change the loose fold cotton buffing wheel to a loose fold flannel buffing wheel, and apply the white polishing compound to the flannel buff, buff the item with light pressure. You will get a mirror finish from this step.
