All this when its in place right ? or did you lift the car ?My process:
1. Degreaser
2. Power wash
3. Tap loose flake with a welders hammer to break free any loose debris
4. Wire brush, wire wheel on drill, wire wheel on angle grinder
5. Brake kleen
6. Power wash again
7. Wipe with acetone
8. Rust reformer
9. Paint with high heat enamel
10. Coat with Surface shield