There are three effective methods for applying body filler over RustSeal so that both products bond and fuse together properly. Choose the method that best fits your project timeline.
Method 1 — Apply While Tacky Apply your body filler once the second or final coat of RustSeal is dry-to-the-touch and does not leave a fingerprint — usually 3–10 hours depending on temperature and humidity. |
Method 2 — Scuff and Apply Let the second or final coat of RustSeal fully cure (at least 24 hours), scuff the RustSeal with 300-grit sandpaper, then apply your body filler. |
Method 3 — Prime and Apply Let the second or final coat of RustSeal fully cure (at least 24 hours), dust the RustSeal with Fusion Self-Etching Primer, let the Fusion cure for 30 minutes, then apply your body filler. |
Pro Tip All three methods produce a strong bond. Method 1 is the fastest. Method 3 provides maximum mechanical adhesion for challenging applications. |
Before you begin, review the complete RustSeal Application Directions for full surface preparation and coating guidance.
Ready to Start Your Project? Shop RustSeal and Fusion Self-Etching Primer below, and review the full application directions before you begin. |