Leo Maida swapped a 3D-printed inline six Cummings diesel engine into his Revell 1/25 scale 1968 Dodge Charger. But he wasn’t finished there, widening the body and cutting open the hood to accommodate that enormous powerplant. He wanted a clean finish and achieved it with a Harder & Steinbeck airbrush and lacquers from ProScale, and Mr. Hobby.