Hangar 9 P-51 Mustang 1.50 ARF Assembly Manual page 30

Section 9: Joining the Wing
Step 7
Completely coat one half of the wing joiner with epoxy up
to the line drawn in Step 1. Be sure to apply epoxy to the
top and bottom of the joiner also. Insert the epoxy coated
side of the joiner into the wing joiner cavity up to the
mark on the joiner. If you have used enough epoxy, it will
ooze out of the cavity as the joiner is installed.
Step 8
Apply a generous amount of epoxy to the joiner cavity of
the opposite wing panel.
Step 9
Apply epoxy to the exposed portion of the wing joiner.
30
Step 10
Apply epoxy to root wing rib of both panels.
Step 11
Carefully slide the wing panels together. Apply enough
pressure to firmly seat the two wing panels together,
causing any excess epoxy to ooze out from between the
panels. Use rubbing alcohol and a paper towel to remove
the excess epoxy. Check to make sure there are no visible
gaps between the panels.
Step 12
Use masking tape to securely hold the wing panels
together. Place the wing assembly back onto the work
surface (covered with wax paper) and check the dihedral
angle. Allow the epoxy to fully cure before continuing
to the next section.