1200 girt silicon carbide sandpaper or use a scotch brite pad very fine or ultra fine will take the yellow away. Or you can spend $$ for some new complete lenses. Check ebay, see them all the time on there.
A forum community dedicated to custom off-road vehicle owners and enthusiasts. Come join the discussion about trail reports, builds, performance, modifications, classifieds, troubleshooting, fabrication, drivetrain, and more!