The past 1,5 years I've been busy building an 80's town with most of the iconic classic town sets and all 12V grey era train sets. I started with buying sets that I didn't have yet, deyellowing all white and grey (including train tracks) parts which took longer than expected:I wasn't done when the summer of 2019 became autumn and by that time the sun wasn't strong enough (if the sun was visible anyway) so I built a de-yellowing device. I've used a total of 40 liters of peroxide solution to de-ye