First of all, I believe it was KAT who told us about the 303. THANKS!!!!
I went by my local marine shop today and picked some up. Dear god it really helps the rubber a TON. Already feels much more pliable and rejuvenated. So there's that.
Second, The Mother's headlight Powerball restoration kit is fracking awesome.
It took me about 15-20 minutes from opening the box and my lights were REALLY clouded and yellow. They are absolutely smooth and clear minus some deeper road dings. I just wish there was a great UV sealer that would work now.
I'm keeping my new set of lights wrapped up until I absolutely can't restore this pair any longer. They look great!
Here are some picks along with my RR treatment a year later (after washing only with no product ever applied since RR application).
I recommend ALL 3 of these products very highly. If you have questions, just ask. I also updated KAT's thread on the RR.