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High-Gloss Polyurethane Finishes   Are you looking for the best possible sanding abrasive product for finishing high-gloss polyurethane finishes? Klingspor's PS73 sanding discs and sheets are specially formulated with a "double stearate" coating to perform exceptionally well in this application.   Technical data: Grain Annealed Aluminium Oxide Coating Semi-open Bonding agent Resin Backing C-paper (P40-120) B-paper (P150-1500) Coating with stearate Application: Rough to fine sanding of flat and curved surfaces with hand sanders Material: Paint, varnish, filler, plastics, composit..