Estes Space Shuttle Columbia Build #1385, Part 7, Balsa, Launch Lug & Tube Filler/Primer

 

Here's the wing, rudder and launch lug ready for a good shot of filler/primer. The parts will be taped to a piece of scrap cardboard for spraying with loops of masking tape, sticky side out.

Spray one side, let dry.

Flip over, re-tape and shoot the other side. Be sure to get the filler primer on the outside edges.

The primer was sanded with 400 grit until the CWF just starts to show under the gray primer.

Down the center is the glue area to attach to the main body tube. I wrapped some 400 grit around a small glue bottle to remove the gray primer. 

Sand down to the the CWF filler. The CWF is water soluble and wood glue will give a good bond.

The body tube was also shot with filler/primer. 

The tube ends were masked off. 

I press and lift the tape against my pants leg a few times to reduce the stickiness. Sometimes you can start an interior peel of the tube when pulling off the tape. With the tape less sticky there is less chance of peeling and delamination.