Originally Posted by weirdbeard
jk. I looked but could not find where I read that. Dangit!
It had something to do with certain types of blasting media impregnating in mild steel and causing weld failure.... I think..
I googled and only found lot of people USING sandblasting to clean metal to be welded.
Just ignore me. I am confused.
The sand will contaminate the steel and make it hard to weld. You need to grind the metal till its shiny.