I'm going to use your Rust Seal  and I want to top coat it with u-pol bed liner. Can I do this? Do I have to scuff the Rust Seal or is there a time frame that I can apply the bed liner without scuffing?

There are three effective ways to topcoat RustSeal effectively with a bed liner so that the coatings bond & fuse together.

1) Apply your bed liner 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).

2) Let the second or final coat of RustSeal fully cure (at least 24 hours), scuff the RustSeal with 300 grit, then apply your bed liner.

3) 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 bed liner.

You can feel free to choose the method that will work for you.