Trailer gets waxed 2 or 3 times a year, which is probably more than needed, but hey, I'm also the guy that waxes my truck every month....so what do I know.....
You probably know about waxing :B
FWIW, I used to be a fanatic about it, had a small fleet of black vehicles (still have three in the fleet, ... hmmm). Anyway, I was at them all the time with clay bars and polishing sprays, waxes, buffing, etc. I still polish them up on occasion. IMO, a good Carnuba wax gives a high gloss and a fairly durable finish, especially when buffed. The synthetics are also good with Klasse being foolproof and Meguiars 26 (has some Carnuba) giving a durable finish.
As the auto-painter said above, a good job takes time, it ain't a race. That's why they call it "detailing".
For the guy in a hurry, the spray on Parfe liquid I linked to earlier is about as fast as it gets.
