Estes Mini Scale Combo Pak, #0874, Tomahawk & Exocet, Build, Part 3, Fin Prep

All the outside edges (not the root edge) get a narrow bead of glue.

Smooth and even the bead with the side of a finger.

After the glue dries, the fin edges are sealed.

Sand the dried glue with some 400 grit.

The root edges are set against each other to keep them clear of the filler/primer.

The fins get a good shot of filler/primer.