Install linear polarizing filters over light sources (reduces output by approximately 50%, requiring higher wattage). For dedicated viewing positions, provide mounted polarizing filters at 90° to source polarization. For broader use, provide visitor viewing glasses. Use only for works where varnish reflections are genuinely problematic—not universal solution due to light loss. Works exceptionally well for highly varnished Old Masters. Specify neutral polarizers that don't shift color. Combine with correct angle lighting for comprehensive approach.