PMF over PMF?

Hello.
I'm building my Thing http://tnttt.com/viewtopic.php?f=40&t=72216 in sections due to a limited amount of space available.
I am skinning each panel with PMF, (TBII and cloth for right now) which will be painted later on.
When I assemble, I will have seams where the panels join which I will want to fill and cover with PMF as well.
My question is, can I paint them first?
If I join painted panels together, can I cover the seams with more PMF? Or, is TBII over paint a no-no?
I have TBII and cloth on the exterior of all my completed panels. Would I be better off painting the exterior of the sections now, or waiting until I assemble and cover the seams first, then painting all at once?
Thanks!
I'm building my Thing http://tnttt.com/viewtopic.php?f=40&t=72216 in sections due to a limited amount of space available.
I am skinning each panel with PMF, (TBII and cloth for right now) which will be painted later on.
When I assemble, I will have seams where the panels join which I will want to fill and cover with PMF as well.
My question is, can I paint them first?
If I join painted panels together, can I cover the seams with more PMF? Or, is TBII over paint a no-no?
I have TBII and cloth on the exterior of all my completed panels. Would I be better off painting the exterior of the sections now, or waiting until I assemble and cover the seams first, then painting all at once?
Thanks!