TM 5-1940-321-13&P
Figure F-12. Rubbing Patch Down with Boning Knife.
( 7 ) Pay particular attention to the edges of the patch. After the patch is firmly in
place, excess glue should be removed from around the edges of the material.
Use the pointed end of the boning knife to rub off the glue. Rub the entire area
with a shop towel dampened in solvent. This will give the area a finished
appearance and remove any marks cause by the boning knife. The gluing
operation is summarized in a step-by-stop sequence in table F-1.
( 8 ) Large patches should not be boned down with the boning knife over their entire
surfaces. A large patch is first rubbed into contact with a folded shop towel
dampened in solvent. Use the towel to apply great force to the fabric to achieve
good adhesion. Work from the center to the outside. Apply pressure with the
shop towel for 2 minutes. An outer one-inch wide area all around the edge of
the patch is boned down with the boning knife.