I once spent a lot of time polishing the mold marks from a G4 Cube case with Meguiars plastic polish. The result was a case that was better than a new one. The Cube had to be sent back to Apple for a repair. I enclosed a letter asking them to be careful with the case. I got back a computer with a new case, with mold lines, and a form letter stating that all components of my G4 Cube had been updated to current specifications.
I guess the mold lines are a design feature.
As respects
Meguiar's Polishes, their website mentions clear plastics any number of times but says nothing about opaque plastics, although I guess your experience with your Cube is telling.
On the other hand, though, I found
Polishing polycarbonate, which is less than heartening (but I might give Turtle Wax a go, simply because it's readily available).
Thanks for your input.
