[doscazadores]

I finally managed to carve out some time (hobby welder for many years, mainly mig) to learn to tig stainless. Got a lot of 304L scrap but it looks like its been sitting a barnyard of a bunch of busy cows for a few years. Photo attached, if I can figure out how to do it.
The left side is how I got it, the right side is after rubbing it out a little using Barkeepers Helper; it's all I could think to use.
I assume the welding surface should be as clean as possible. But what's the best way to achieve that condition?
Thanks for any suggestions.

[DSM8]

wipe down with Acetone.
Wear rubber gloves.
You could wire brush and then wipe if really concerned about the crud.

[Wes917]

I would clean it up with some scotch brite, since it sounds like you have a lot to do I'd get some scotch brite discs and mount in your die grinder or drill. Clean the crud off with them, then wipe with acetone until the rag doesn't show signs of dirt

[450dualsport]

wipe down with Acetone.
Wear rubber gloves.
You could wire brush and then wipe if really concerned about the crud.

Be sure to put the rubber gloves on in slow motion and sing high while you're doing it!

[Superiorwelding]

wipe down with Acetone.
Wear rubber gloves.
You could wire brush and then wipe if really concerned about the crud.

Be sure to put the rubber gloves on in slow motion and sing high while you're doing it!

-Jonathan

[FSU58]

You can pick up flap disk sanding wheels for any size angle grinder fairly cheap at your local weld supply shop or hardware store. They work well for metal prep prior to welding, just make sure you dedicate that wheel for stainless only. Write stainless on it with a sharpie so you don't sand some carbon steel with it one day and contaminate your stainless with it the next time you use it. Good luck with the practice!