Note: We have no grinding discs in this section. Why? Because both the products we are recommending work faster, give a better finish and have much lower vibration characteristics making them much nicer and safer to work with. RCD - Ultra Coarse: The latest edition to the RCD family with a high performance ceramic abrasive cloth and the heavy duty surface conditioning materials they will remove welds quickly and leave an excellent finish ready for paint prep. or FTC - P40 grit: You just want out and out cut. Much faster than grinding discs but with the finish of a P40 flap disc. It really is the obvious choice.