I bought a p3 with the smartcraft gauges with the yellowed lenses slso. After doing alot of research decided to try this myself, removed the gauges from the condole, pop off the bezel, and then very carefully pry out the lenses. The lenses are held in with small tabs and a rubber o ring, they have a plastic inner lense that yellows I removed that cleaned up and reinstalled . I dont know long term how water proof they will be but Ive fish in the rain twice since I did this with no problems, hope this helps.I have pics if you want to email or txt me your number