Hi all, i am polishing up some old stainless steel moulds. I start with a sisal/emery combo and then finish with spiral sewn/green & loose/white.
The piece shines up almost mirror after cutting with spiral sewn/green however after this step there are also many small pits left in the piece. They are only visible when looking up close.
Does anyone know what causes this?? Is it excessive heat?? I find that if i don't apply enough pressure (which heats the piece) then the buff does not cut well enough.
I have also found that sometimes when dry sanding with 240 grit it can leave bigger pits sometimes.(which are very hard to get out).
So what causes this to happen?
I took a photo which shows what is happening:
