What steps are required when applying a top coat over Rust Bullet?

A top coat should be applied from the time the Rust Bullet Coating is dry to the touch, up to 6 hours after the final coat of Rust Bullet. If 6 or more hours have lapsed, wait for Rust Bullet to harden for at least 24 hours then lightly scuff with 150 grit; enough to break the glaze to create a surface profile.
If a spray application of Rust Bullet has been accelerated by adding Rust Bullet Rapid Fire Accelerator, a top coat may be applied approximately one hour after the final coat of the accelerated Rust Bullet coating has been applied.
If you are using a premium finishing paint and the manufacturer has specific primer requirements, it is recommended you apply the primer over Rust Bullet after the surface has been scuffed.