The absolute best imo is Old English. Costly but they work very well! My second choice would be Autosol
I've used many and have not looked back. Heavy Metal Polish is my go to polish. Blue Can is used most - light cut Green Can (medium cut) which I will follow up with the Blue Can. Cannot say enough about Heavy Metal Polishes. Second runner up in my stash is Flitz and Mothers Billet Polish. Billet is like the P085RD metal polish of stash....I use it to ~jewel~ up the finish and amp it up another level if I decide to. Dunno what size of Flitz you have but mine is really huge...it's like 2 toothpaste bottles in 1.
i like what i read about english custom polishes, but my cheapest bet is to the the big bottle of flitz and keep a mothers billet around, have had goo luck with the billet in the past