I'm using rust seal and black top on the frame of my truck. I've put two coats of rust seal on and I was wondering if there is anything I can put between the rust seal and the black top to help make it more solid and durable or should I just put another coat of rust seal? What would you recommend?

2 coats of RustSeal and 1 coat of BlackTop will be extremely durable. If you are concerned about getting maximum adhesion of the BlackTop to the RustSeal, here is our suggestion:

There are three effective ways to topcoat RustSeal (with BlackTop, KBS MAXX, or other top coat paints) effectively so that the coatings bond and fuse together. Please choose the one that works for your project.

1) Apply your top coat once the second or final coat of RustSeal is dry-to-the-touch and does not leave a fingerprint (usually 3-8 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 320 grit, then apply your top coat.

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 top coat.

Please let us know if that helps and if you have any additional questions.