Does this come with all the fasteners and brackets I need to mount it?

The tonneau cover assembly is included. Fasteners and mounting hardware are not confirmed — verify your tool kit and test-fit before final installation.

How do I keep the rolled-up cover clean and protected when it's sitting at the cab?

Roll-up design sits snugly against the cab when fully closed. When rolled up toward the cab, keep it away from roof racks and overhanging branches. Regular rinsing will prevent dirt buildup in the mechanism.

Can I paint or seal this before I install it?

Test-fit the cover first to ensure proper operation and alignment. If you plan to paint or seal it, do that work before mounting to the bed rails.