Your truck looks great, Chris B. I'm glad I was not the only anal one to wax/seal the inside of a truck bed. It paid off. I loved the BedRug in my previous Ram.
Similar to others here, I use the wash water as a clay lubricant. After washing a portion of a vehicle just splash on some wash water from the bucket and rub the clay over it. Claying creates micro scratches no matter what lube you use. Polishing your paint every year or so removes the scratches.