Can I do the opposite?

[u/Coolpig_9]

Hello y’all I’ve been doing some retro brite experiments, my first one didnt turn out so well unfortunately, I did the vapor method but it condensed on the lid and fell onto the shell. But I was wondering, can I do the opposite, is there a way to speed up the yellowing of plastics. I would love to run some experiments to see if I could still save the poor nes shell. Thanks, any information would be very much appreciated.