1974 Scamp some assembly required

...I would think that you could find something in a spray can or get a quart of paint the body color...

You absolutely can...there are hundreds of places that can mix custom aerosol paints for you in factory color codes-even in little old Abilene, Texas we have them. It’s probably not show winning paint, but if all you need is some touch up or area repair, it’s a nice option.