My windscreen is really old and discolored-it is amber in tint now-any product out there restore the canopy without replacement-thanks

I doubt it can he restored as it's UV and oxidation. I paint mine from the inside black or silver on older planes so that's a less desireable option but sometimes less ugly. Oreylly's autoparts sells a headlight restoring fluid that works better than many others on headlights as it has amonia in it. I doubt it will touch this but worth a shot if all else fails. Black bottle, blue flip cap, if I remember right.