Duragloss 105, easy to apply and wipe off with no smell or powder and it's durable. Cost is good and reasonable.
I like their whole product line.
Recently it was nice of Mother's to give me a free 4 oz sample of California Gold Synthetic at a car show (Syracuse Nationals). I heard it looks great on a black car which I had and wanted to try it. It had all the good traits of the Duragloss and maybe exceeded them.
It's weakness is durability, unless you like to wax monthly.