...scars" then "faded scars" over time.
This would be good for the haves vs have-nots theme, and would give another good thing for skilled doctors to do. It would also put a highlighter on the characters who have seen troubled lives, which would make the transfer from mix to corp more interesting both going up and falling down. The cut up mixers would be sneered at going up and the pretty and perfect corpies would slowly loose their shine as the scars accumulate.
It would also solidify the "do scars make it after cloning" debate which has always been a little nebulous for my liking. I'd say the rules should be:
Scars you have when you update stay with you.
Wounds you have when you update come out as scars.
Wounds/scars you take on after an update don't appear on clone.
Corpse-clone results in some char mangling, this could maybe be reflected in a naked as well?
Oh, and chemical burns! Labs and presses blow up should chemical burn you and result in the same kind of burn/scar potential. A chem-jockie running an illegal sketchy underground lab that goes boom should definitely have some scars to prove it, and a high end super corpie chemical doc should be pretty much burn free as a sign of their caliber.
Rapidly, everyone's nakeds would turn either into 'She has a scar on her head. She has a scar on her head. She has a scar on her head.' or 'Her head is covered with scars. Her neck is covered with scars. Her left shoulder is covered with scars. Her right shoulder is covered with scars.'
That would end up telling less of a story than right now, where you can have a slash across your eye for something famous that happened, you know?
FWIW - The few scars I have added to my character have always been after getting corpse cloned. I have always RPed that new clones are clean / blemish free.
As for scars sticking on clone death? I say keep it as is. Cloning takes a DNA map to recreate you. Physical scarring is erased because superficial damage doesn't mean damage on the DNA mapping.