That's what your @nakeds can include.
Weapons aren't the only things that can cause scarring. Sharp tips of metal when you're making gadgets, if you exercise and fall, you can get scars.
It seems an RP bit. You practice sparring with a blade or were shot and survived, you'll get a scar and when you update, the scar remains (or could).
I remember reading a thread that mentioned some characters keep scars even after cloning since it's a psychological thing. It's something that helps define them in some way and it stays during the cloning process. I know you walk through SenseNet and sit yourself in a pod but if you read the room descriptions, there are people there walking you through the process (at least at first). And so, you can end up keeping some of these scars that define your character in some way.
Withmore is the first time you have a clone or maybe the first time regaining a clone. Your character has certain marks they don't want to lose, or maybe they do because they want to start newly here and discuss this with SenseNet so when you are cloned, you don't have the reminders except maybe one or two particular marks (of course that could be a clinic's doctor helping you with some of those if there's a rush and you have the money).
IMO, coding it to look right and position it right might be a nightmare and time consuming (I'm not familiar with coding) and coding can be used for more important things like additional rooms to explore and NPC's to come across or updating weapons, armor, toys and food. I'll use @nakeds, but maybe some others might like the idea.