
2-80. REPAINTING. If it becomes necessary or desirable to repaint the aircraft, the following procedures will
apply:
a. Mask all glass and areas not to be painted.
— NOTE —
Solvent resistant masking tapes are authorized for use.
— NOTE —
Masking tapes should be removed as soon as practicable after finish application.
b. Clean all surfaces with a suitable cleaning solvent to remove dirt, grease and oils.
— NOTE —
Solvent may be applied by dipping, spraying or mopping.
c. If the metal surface has been stripped, prime with an aircraft quality primer according to instructions for
appropriate finish.
d. If the previous coating has not been stripped or removed thoroughly, wet or dry sand the previous coating
with 400 to 600 grit "wet or dry" abrasive paper.
e. Thoroughly wash the sanded area with a suitable cleaning solvent and wipe dry with clean rags or other
suitable materials free of lint and silicones.
f. Repair with desired color according to instructions.
2-81. PRODUCT LISTING FOR URETHANE ENAMEL AIRCRAFT FINISH (OPTIONAL FINISH).
a. Prime Coat:
DuPont Corlon Epoxy Zinc Chromate Primer 825S
Primer Catalyst 826S
Primer Reducer 3602S
b. Color Coat:
DuPont Imron Urethane Enamel (Selective)
Color Catalyst 192S
Color Reducer Y8485S
Accelerator 189S
Additive 259S
c. Suggested Solvents:
Safety Solvent per MIL-S-18718
Sherwin Williams Lacquer Thinner R7KC120
Glidden Thinner No. 207
2-82. PREPARATION OF EPOXY ZINC CHROMATE PRIMER.
a. MIXING RATIO: Two parts primer 825S with one part activator 826S. Thin with approximately one part
reducer 3602S, mix thoroughly, and allow to stand for one hour minimum.
b. DRY FILM THICKNESS: 0.0005 to 0.0007 inch dry film thickness.
c. TOPCOAT: Urethane enamel may be applied after 30 minutes minimum at 75° ± 5°F.
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY 28, 1989
HANDLING AND SERV I C I N G
1C15