Here's a transcription of that chart I mentioned, detailing the compatibility of common finishing products for model airplanes. The chart tells you whether a product can be applied over or under all of the other products on the list.
COMPATIBILITY OF COMMON FINISHING MATERIALS: c= compatible n= noncompatible
COMPATIBILITY OF COMMON FINISHING MATERIALS: c= compatible n= noncompatible
V P D A N B A A E A P I O U E I U C L P C O N L P R T T R K O R L Y Y O O R Y Y Y X Y Y L N A R L D Y L R T G T A I I U S E L E T C E E C R P S 3 O E N N E A I 0 S D L A A E T C N 5 S O D A M M N H K P O C E E A A L D E P Q L L M N E O E U E E P E L E R --------------- OVER----------------------
VINYL SPACKLE ] c n c c c c c c c c c ] POLY RESIN ] c c c c c c c c c c c ] DUPONT 305 ] c n c n c c c c c c c ] AERO GLOSS DOPE ] c c c c n c c c c c c
NITRATE DOPE U c c c c c c c c c c c N BUTYRATE DOPE D c n c n n c c c c c c E ACRYLIC LACQUER R c n c n c n c c c c c ALKYD ENAMEL ] c n c n c n n c n n n ] EPOXY ENAMEL ] c n c n c n c c c c c ] ACRYLIC ENAMEL ] c n c n c n n c n c n ] POLY URETHANE ] c n c n c n c c c c c