When do I do the Cavity Coater? After prepping and coating the outside of the frame with RustSeal or before?

For best results, prep and coat the outside of the frame with RustSeal first, allowing it to fully cure for at least 24 hours before applying Cavity Coater to the inside. This sequence makes cleanup easy — any Cavity Coater that seeps out of the frame holes can simply be wiped away with mineral spirits without disturbing the cured RustSeal.

Before starting your restoration, review the complete directions for both products: RustSeal Directions and Cavity Coater Directions.