Some builders have luck with just white glue around the backside of a wrap.
I'm not that lucky.
I prefer to use spray adhesive, it gives you a second or third chance at repositioning the wrap. I never seem to get it right the first time.
This Duro Spray Adhesive can is old, maybe over 10 years old. It never seems to run out.
The picture shows all three wrap pieces ready to be sprayed. The cardboard backing was lightly sprayed and allowed to set up for a few minutes. The wrap pieces were placed lightly on the sticky cardboard, just enough to hold them down for spraying the backs.
A pencil line was drawn down the body tube and the first upper wrap was applied, lining it up down the line and with the top of the tube.
The second, longest wrap was started immediately below that using the bottom of the first wrap as a guideline.
Finish up with the third wrap.
The BT-20 tube was long to begin with, I cut off the end and sanded it square with the end of the third bottom wrap.
Be ready - The end seams will lift!
This is a compromise with using the spray adhesive. By using the spray adhesive you have the chance to re-position the wrap. If you apply white glue to stick on the wrap, you get one-shot to get it correct. Once it's down, you won't be able to move it.
Place a few drops of white glue on the corner of your work area. Dip just one side of you hobby knife into the glue. Push some glue under the lifted wrap the run the blade under the wrap edge to smooth out the glue.
Notice that I wrote: Dip just on side of the blade into the glue. This will keep the glue only under the one side of the wrap. Try to keep the glue off the printed outside surface.
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