1964 Valiant "Get Runnin & Drivin"

No clear, just straight out of the gun.
My Willy’s I painted with Summit single stage and is still shiny.
If you have air, spend a few extra pennies for at least automotive paint.
I think when I painted my Willy’s a gallon of red was only like $140, plus thinner and reducer.
No clear needed.
The shine you can get with single stage acrylic urethane can be great. I was always told the speed of the reducer can have a big effect, than is slower reducer than what you would normally use will give me depth and shine. Of course, if you are like me, no booth, get it dried before all the bugs lite is a big factor!!!!!
All the time we put into body work, at least a good single stage is worth the $.