Sanding & Abrasives Abrasive discs help you to grind, clean and smooth to achieve the required finish on metals, wood and plastics using an abrasive coating.Stripping discs remove paint, varnish, rust and grime from metal. Also ideal for surface conditioning stainless steel.Flap discs are used mainly to grind down metal surfaces. The 'flapped' formation of the disc improves the lifetime of the product by increasing the surface area and less likely to cause stress points . This means that they should last longer than standard metal grinding discs. The product is slightly flexible, which allows it to produce a smooth finish even on curved surfaces. Various grits are available to obtain the smoothness required.