I know you say the truck will never look great and that you just want to make it look better. And to that end, the products you have will do a fine job of that.
But... you're working harder then you have to, and getting worse results then you could if you used better products.
For years I played with things like turtle Wax and such. Polish the faded paint, wax madly, and the vehicle would look ok for a few weeks until the wax wore off. I'd have to make sure I ignored all the polish stains on the plastic, the wax stuck in the trim, and the mediocre polishing of the previously faded paint. I put up with it for years because I really didn't know any better. After falling for that horrible new Gold Class super wax from Meguires, I'd had it with this sort of stuff. All that sweat and time, only to have the car start chalking its way back to pink in a few weeks.
I finally took the plunge and bought one of those exensive brands. I personally chose Klasse, but others like Zaino are very good as well.
Wow, less effort, better results, longer lasting. No more stains on the plastic. No more chunks of wax and polish in the trim. No more fading in a few weeks.
Life is GOOD with the good stuff! Might I suggest you join in on this band wagon too?