Depends on the color. Can't touch up black...cuz you will see it from a mile away. If they are minor you can give the truck a good wax and it should help make them less obvious. I like Eagle One Nanowax and Mother's SYNWAX. Both work really well. If one of those don't help I've heard that they make a color wax...which will nearly eliminate small scratches and will really give a brillant shine. You must buy the correct color for your car and the color waxs are a little hard to find.
Also if the truck is black...don't let anyone touch it with a buffer unless you know they do really good work. Black vehicle + buffer = swril marks if done incorrectly. Meaning the buffer got the wax to hot leaving barelly noticeable swrils on the clearcoat. Looks similar to streaks on improperly cleaned glass