Since you haven't done it yet why not paint the under side to simulate how it actually came from the factory , primer color then overspray ?
I considered this route but ultimately decided I like the look of the painted underneath. The car will have some intentional aspects of OE, but I didn't want to recreate anything that I felt was a byproduct of mass production.
Haven't done that color, but your process is pretty much what we have always used. Touching up the single stage is much easier than base/clear. Are you planning on painting the bottom in primer gray or body color?
Ok great, thanks for the feedback. I feel like everything I read before buying paint said to go BCCC for exterior. After I bought the paint I feel like everything said to do single stage haha, hopefully it just turns out respectable.