How to Polish Polycarbonate Visors and Lenses: Scratch Depth Check Before Sanding (800–3000 Grit Guide)
Polycarbonate visors, helmet shields, and machine guards often collect scratches that scatter light and obscure vision. Before sanding, it’s crucial to assess scratch depth—removing too much material can distort optics. This guide shows how to evaluate, sand, and polish polycarbonate...