Surface conditioning belts are excellent for removing weld discolouration without removing lots of additional parent metal from the surface. We have included two grade options here Option 1 - FE2 / medium: This is the first choice option as it will give great belt life and a fast cut Option 2 - FE3 / very fine: Still a good option but as it is the finer grade we recommend it if you are wanting to restore a polished or bright finish so you don't want to cause too many scratches.