Description
For aircraft fuselage prep and composite repair work, 3M 240 Grit Sanding Disc 6in strikes a practical balance between material removal and surface finish. Cheaper open-coat alternatives may clog faster and require more frequent disc changes, especially when working fiberglass or paint buildup—false economy when your labor time is money. This 240 grit hits the sweet spot for general smoothing before primer or final paint without the aggression of lower grits or the slowness of 320+.
General-aviation owners tackling panel refinish, engine cowling repairs, or aileron strut prep will find these discs work well with standard 6-inch DA sanders or orbital tools. While 3M’s open-coat design resists loading better than closed-coat equivalents, results still depend on your sanding technique and whether you’re working bare metal, primer, or cured paint. Keep spare discs on hand—they wear faster on composites or thick primer than on aluminum—and always wear respiratory protection in your workshop.
