3M 431Q Sandpaper 9"x 11" Wetordry Sheets

Typical aircraft maintenance uses include:

• Surface preparation before painting
  • Smooth primer surfacers before applying topcoat.
  • Feather the edges of repaired paint areas for seamless blending.
  • Remove minor surface imperfections, dust nibs, or orange peel from primer.
• Composite repairs
  • Prepare composite repair areas between filler, primer, and finish coats.
  • Sand epoxy fillers to the required contour without leaving deep scratches.
  • Refine fiberglass or carbon fiber repair surfaces before final coating.
• Metal surface preparation
  • Lightly abrade aluminum, stainless steel, or titanium surfaces before applying primers, sealants, or coatings.
  • Remove light oxidation or staining without aggressive material removal.
  • Blend minor scratches that are within approved maintenance limits.
• Paint finishing
  • Wet sand clear coats or polyurethane finishes to eliminate dust particles or minor runs.
  • Prepare cured paint for polishing when required by the repair procedure.
• Plastic and transparent materials
  • Carefully sand acrylic or polycarbonate fairings and interior plastic components during cosmetic refinishing.
  • Progress through finer grits before polishing to restore clarity (following approved maintenance procedures).