I like to do the build, assemble, disassemble, then paint method...This takes more time but the results are well worth the effort, any changes
can be done before all that pretty paint gets on there, Most pieces can be test fit in the mock up, The depth of the T moulding channel and
metal trim for example can be fit not necessarily assembled. Depending on the paint you will be using the seams of the cab will potentially
stress crack (with a heavy spray finish) I like to lightly score these seams after the paint is dry so to crack evenly follows the seam and looks
natural, and not like a shell of paint was applied allowing the crack to become uneven and noticeable.... Good luck.