Well... I am guessing that there will not be a better time than now, should you wish to do a colour change.
If you pull out the glass there will be minimal to no masking to be done, and you'd also likely end up with a better job .
My only advice to painting the cab would be to use a commercial 2K paint, opposed to auto paint.
Auto paint relies on a clear coat for the UV protection, whereas a commercial paint does not. For an expedition vehicle, that is more likely to get bush pin striping during its life, doing patch repairs on paint with a clear coat is much more of a pain.
Alternatively, using something like Raptor (a bed liner) is something that has become quite popular of late. This surface finish is more durable than most paint finishes, but it does usually have a texture.