I typically just do it once a year with whatever I have in the garage. Nu-Finish works great for bringing back some shine to dull surfaces Ive found. I hand wax/buff it just due to its only a 16' but any longer Id have to buy a elect. buffer.
*Currently trailer-less but shopping
07' GMC Envoy w/ P2 controller (current TV)
88' Chevy K5 Blazer (soon-to-be TV)
74' VW Superbeetle (1303)