Fixing yellow headlight lenses

My oldest son is a very visually-oriented kid, and one of his primary complaints about the Volvo is that the headlight lens are “all yellow and gross looking.” A superficial analysis, sure, but also very true. 26 years of sun exposure has left the lenses cloudy and yellowed with oxidization. I looked around and found lots of information on how to clear them up. It’ll require a bunch of elbow grease so I think I found a project for the kids!