I have my front floor done with Herculier applied with a stipple brush. I did it over top of 2) coats of Primer 2 coats of Epoxy sealer and 3 coats of single stage Polyurethane. Which was allowed to fully cure. Then carefully scuffed up with 220 grit paper. followed by vaccuming and a wipe down with Prep-all.
I am so far very happy with both the look at the textured results.
I would never coat a whole jeep unless the body was no worth fixing up. Once moisture gets under it and it will unless you have like I did a complete solid paint layer under it. You will have the metal rust out inside it. Its a super PITA to get off and should you need to do any repair work to the sheet metal it can double the amount of work required,