ive used the round sos like pads, that pigtail into a rubber backing of grinder/ r. angle air die grinder. red,blue,grey - depending on coarsness

 

2" roloc disc with scotchbrite pads, they also make scotchbrite A/O points/drums/flapwheels that mount in die grinder. Following up with citrus surf passivation gel, and clear rinse.

Quick change pad burgundy: https://www.mscdirect.com/product/details/03456928 grey is even finer

Surface conditioning belts on bench top belt sander or dyna file sander : https://www.mscdirect.com/product/details/00222844

Best to keep these separate from ones you use on mild steel, so you don't get rust spots.

HTH

 

Thanks, I made up some stuff with citric acid and a crock pot several years ago to fix a few units that got hit with a carbon steel wire brush as they were starting to rust. Learned my lesson on that one and now put plywood down on the table when I am using the wire cup.

Was hoping for a magic bullet, the product is rod and flat so multi level, but appreciate the ideas. That citrus acid thing is a good idea to go back on and revisit.

Going to try to slow down the grinder and maybe the brushes will last a little longer.

 

Google" electric passivation machine " there are many links to commercially available units as well as DIY systems.

Here is one DIY link
https://www.instructables.com/DIY-Stainless-Steel-Weld-Cleaning-Electropolishing/

 

I have had good luck with Citrusurf products. http://citrisurf.com/

Look under the "information tab" there is some good stuff in there.

RideKTM350

 

pickling paste? Nitric acid based.

Or electro cleaning, works great on TIG welds, not sure about MIG

 

This for mig.

 

I like to finish using the blue ScotchBrite discs and then a sisal or cotton wheel with black emery to cleanup the welds on stainless, followed by a wipe-down with acetone or denatured alcohol.