Filling seams where superstructure meets main Deck

Try using white glue spread out with a wet q-tip. I use the testors window maker stuff with the long pointed tip. You then paint after it dries (clear).

I will give you the same recommendation as Tim, use white glue. The Testor's stuff is also my favorite, however, I've used Microscale's Kristal Klear and Elmer's glue with equal success. To control the quantity, I apply it with the end of a very small diameter steel wire, about an inch long, that I've inserted into the end of a short length (5 inches) of 1/8 inch dowell. Gives me good control of a drop of glue at a time.

Tom