RE: Touch Up Paint?
Modern paints have a number of layers and have fairly durable chemicals in the paint. There are products in the car wax section that can remove scratches, but they won’t work if the scratch is actually deep enough to cut all the way through the colour layers down to the primer. Still, for less than $10 and a few hours of elbow grease, it’s worth a shot. But why bother? I think that most people with stranded cars do not bother.