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Only some types of paint are friendly with wet sanding, and my experience is that latex isn't one of them. When you wet sand automotive lacquer, you're removing the orange peel and minor imperfections that exist in an air-dried finish. That leaves a surface which is smooth, but dull. The final gloss is achieved with hand or machine glazing/buffing. Factory applied finishes are blessed by heat in a controlled atmosphere, so the paint flows out very smoothly.
If you only have one or two doors to do, rent a small HVLP rig for the day. You may need to thin the paint to reach the viscosity the sprayer needs, and if so, apply multiple coats for proper film build. HVLP creates less overspray than a regular gun, and because the pressure is lower, the finish is smoother, with less bounce.
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There ain't nothin' more powerful than the odor of mendacity -Big Daddy
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