I agree, NO REASON in the known universe to use red loctite on a crown race and that red substance on the steerer tube is PAINT,..red loctite looks different,.....that looks like nail polish, or touch up paint (thin, little hiding).
scratches happen, but only if your careless,...the shop manager might not know about it either if the mechanic is trying to hide it (and obviously someone was).
you need to talk to the shop, it's definitely their fault, and they need to make it right.