Yeah, use approved plastic scrappers at all times.. Not some old painting spatula that I've seen in some places! 10810 is a good part number on google.. Skins at the Wing to body fairings on boeings are another favourite place to see nasty man made scratches.. So much aerodynamic sealant to remove..
Cos the ATR SRM doesn't call them scribe lines, bet it will call them scratches!!