I"m having to do a 5 foot butt weld section in the inside of my crew cab. I wan't to really grind down the weld beads smooth. What kind of grinding discs(20,40,100 grit) would you use to get those weld beads smooth? Also once those are done what is the next step for preping those welds for primer? or is Primer the next step?
picture of weld beads I want to grind down smooth and prep for painting