Sand the Primed Surface Smooth

What happens here

Once the shellac primer has fully dried, use a Filmtek 320 plastic abrasive pad or a similar fine-grit (e.g., 320-grit) sanding sponge to lightly sand the primed surface. Focus on the areas where the 'fish eye' created raised edges or 'volcanoes'. The goal is to smooth out these imperfections without removing too much primer. Proper sanding is crucial; if these areas are not completely smooth, they will still be visible after the final paint application. A vacuum sander system is used to minimize dust during this process, ensuring a clean working environment and preventing dust from re-contaminating the surface.

Goal: After the primer dries, the 'volcanoes' created by the 'fish eye' must be carefully sanded down to create a perfectly smooth surface for subsequent coats.