I work at a restoration shop, we paint all the hard to reach components, jams, edges, apart at first (assume you are using base & clear), then assemble hood, doors etc. and continue to paint the panels all at one time in the booth. This gives us a nice color match and the panels have the same appearance, very critical with pearls or metallics. Once the base is applied, disassemble once again for clear coating. There is no good way to avoid adjusting the doors multiple times. If you use single stage, you can manipulate the color with the paint gun distance and angle if necessary.
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