I would cover it while fully assembled, because it fills in the cracks. Apply the Resin, sand it, then add some black spray paint to it and it will turn out fine.
What I did was copy exactly what tony did. He has a build thread that is going to be your reference guide. http://www.whitearmor.net/forum/topic/31877-Ukswrath%27s-FOTK-build-thread-%28TK-10116%29
I glued by whole ABS kit with 401 loctite. That stuff is so strong it makes your eyes water, also blends plastic permanently.
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LOCTITE Instant Adhesive Cyanoacrylate Super Glue