ideally all the shuts/returns first, then the outside in one hit! the problem with metallics/pearls is the particles can fall/settle in different planes if the panels are separate.
candys are a different kettle of fish as the number of layers affects the depth of colour, hence, why on some candy sprayed cars, the panel around the door is darker as it gets a double hit when the shut and outer panel is sprayed!
as you plan original colour all the shuts can be cleaned and masked off accordingly....
i'm trying to work out paint logistics on mine at the moment... who/where/colour.....
aka Jonathan!!
'92 charlotte green auto.... as a daily
'37 Ford Y street rod......... something for the weekend!
...... if a photobucket pic is foggy, click it, and it'll take you to the clear version, yes, it's a clicking faff....