Cut rust to healthy metal, fit patch panels with precise gaps, and prefer butt welds dressed carefully to minimize filler thickness. Shrinking discs tame high spots, while hammer and dolly work restores crown. Treat cavities with zinc-rich primers. A hobbyist once discovered hidden braze in a quarter panel; replacing it corrected a wavy reflection that cameras always exaggerated.
Start with epoxy primer over clean, prepared steel, then build with high-build primer and use guide coats obsessively. Block in long, patient strokes, changing directions to reveal lows. Align doors, fenders, and decklids before final primer. Uniform gaps project competence. Seam sealer application must be even and factory-appropriate, because judges notice texture and placement almost as quickly as color.
Control temperature, humidity, and airflow. Respect flash times, filter the booth, and wet the floor to trap dust. Decide between single-stage authenticity or basecoat/clearcoat brilliance. After curing, wet-sand with increasingly fine grit, then compound and polish carefully. Finish with a durable protection layer. That mirror-like depth is earned by patience, not tricks, and it withstands unforgiving show lighting.