Quote by fartripper67
For use over Dupli Color general purpose paint, that is.

Use the Clearcoat from the same family ... if it's Acrylic Lacquer Colorcoat, Use Acrylic Lacquer Clearcoat.

Also, I've used Deft Nitro clearcoat in a spraycan, available at Lowes, Home Depot, etc. over Duplicolor. I suspect the water-based Minwax Polycrylic will also work. Try over scrap wood first.