Quest Raptor Build Part 5, Seam Filling

On the black tank, I'm filling the joint between the nose cones and body tube with CWF.

The tip of  an old knife blade is dipped in thinned CWF and dragged down the seam. This keeps the CWF in a smaller line, the blade tip pushes the filler into the seam.

The interior of the shorter 4" 35mm tube is filled with CWF. The seams were wide enough to justify filling them. Simply brush on some CWF and let dry.

Here's one way to sand the interior of the tube.
400 grit was taped around a 24mm engine casing on a dowel.