Hey Bitbang hivemind! I have (somewhat questionably) purchased an old Blue&White G3 case for a future project. It's in rough shape though.

Are there any resources people can point me towards on how best to deal with that late 90s translucent plastic? I'd like to remove scuffs without scratching further, replace brittle parts that have disintegrated, and repair cracks if possible. I feel like the knowledge I have won't work when it comes to translucent plastics.

@Geekman Plastic polish is abrasive, though, so I got somewhat weird results on matte surfaces. I found regular rubbing alcohol to be great at getting scuffs out. Hopefully that gets you most of the way there!
@andrewwatterson That seems key – start with the least destructive/aggressive methods and move down the list, testing as you go.
@Geekman A good strategy! But don’t be too cautious — counterintuitively the way polish works is to abrade the scratches away. Took me a few tries to believe that you use harsher abrasive (Novus no. 3) to get big scratches out, but it will leave a matte/micro-scratched surface behind. It’s not ruined! Then you use a lighter abrasive (Novus no. 2) and it’ll improve it greatly. Then you do that a few times and buff heavily, and it’s nice and smooth.
@andrewwatterson That's a great tip. Appreciated!