Restoring (and I do mean 'Restoring!') Plastic

Hi, gang, Got a couple of 3M telecom test sets (965TD's) that need some cosmetic help. No, they're not off-topic. First, they both use an embedded DOS-based computer, and second they're both over ten years old. Anyway... The outer housing is made of (I think) high-density polyethylene, the same stuff that the outer jacket of telephone cables is made from, molded in bright glossy yellow. At least it was bright and glossy when new. As one might imagine would happen with field craft instruments, these have been dinged and marred pretty badly. My question is: What's the best way to restore them? I've tried simple plastic cleaner/polish, and it helped a bit, but the scarring is still there. What I'd like to do, ideally, is take enough of the outer layer off to smooth things down, and then polish it up so that they look new. With that in mind: Anyone know a good way to recondition HDPE? Thanks much. -=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com kyrrin (at) bluefeathertech do/t c=o=m "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"