You are welcome.
I've never shot metallic base, yet. I'm a little intimidated by it to be honest.
My understanding is that you have to get the coverage very consistent, otherwise you will see stripes or splotches in the final finish.
You might consider doing the truck in sections.
It is going to be very difficult to "walk the truck" from end of the bed to the front of the fender, for each pass.
And you don't want to start/stop spraying at the edge of each panel (bed, door, fender) as you will get too much paint at the edges.
You could make it easier by doing the bed in one session, let it dry overnight, mask it off and do the cab/fenders in another.
Don't leave the masking tape and or paper/plastic on fresh paint overnight, get it off as soon as possible. (I made that mistake!)
Also, you'll want to figure out how to get very even and consistent passes on the roof and hood.
Consistent paint coverage means consistent speed, distance and gun angle.
What will you need to achieve that on those panels? Ladder? Take the hood off?
Try practicing making passes on each section, with your gun attached to the hose (with no paint of course) and see how it is going to work.
Just some thoughts.