This isn't mig you know.... ^^^ That won't work for s**t, as demonstrated by that abortion you've taken a picture of...
a wire brush is your friend here.
.
a twist knot brush in a 4.5" grinder is a god send when stick welding...i left it far too long to get one
They are brilliant, but spending the evening pulling the wires out from your clothing that was under the overalls isn't something I enjoy!
i havent found them in my clothes yet...occasionally in my arm ut not in my clothes lol
Are you running them slower, such as from a variable speed grinder?
I know full well that when I pick up a grinder with a wire wheel I can expect to keep feeling and pulling the bits out from my clothing (torso, arms, legs) from that point until bed. And that's including what stayed put after the overalls came off.