Base metallic colour, overlaid with vreeble panels, endless lines inside the vreeble panels. So you mask off the panels, use pinstriping tape to lay out the endless lines, then spray the vreeble. Then before you unmask it, fog the edges of the panel lightly with a straight darker candy blue. He didn't do it here, but before you pull up the tape, you could also fog over the endless line with another colour in an airbrush, set the spray pattern on the airbrush at say about 1/4", then follow the endless line around. On this particular colour combo, you could use say candy purple? Just as an example. Then you pull the tape up, and you have a blue vreeble panel with a silver endless line, with purple fogged around it. If I did that, I would fog the edges of the panel with the same purple.