FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 3. Fiberglass and Plastics | 2. Metallic Sandwich Secondary Structure Repairs | 3-11. Finishing
9/8/98
finished for corrosion protection. For coatings
to perform their function properly, it is essen
tial that they be applied to surfaces that are
clean, free of voids, and smooth. The edges of
all parts not protected by a bonding of alumi
num or glass-fabric laminate must be sealed to
reduce the rate of moisture absorption.
3-12.3-17. [RESERVED.]
AC 43.13-1B
Par 3-11
Page 3-13 (and 3-14)