Here we need to address Waxes & glazes, and another product called Wizard's Mist n Shine.
As far as getting that luster back in your old paint, or bringing out a show quality shine in a somewhat shiny paint to begin with, I prefer Race Glaze, or a McGuires brand glaze. "Not a wax". Glazes give you that high luster sheen, and unlike waxes, don't leave a hard crusty white powdery film that is really hard to remove once dry. They go on easy, and wipe off easy. Both products can be applied with a buffer, or by hand. I've used, and still do use both.
Lots of people swear by Wizard's Mist and Shine.
I think this is o.k. for quick cleanups, and shines, but does not compare to a glaze. Because it has alot of cleaning agent in it, I've actually had it remove the glaze I just applied, and lost the high luster shine to get Wizard's Mediocre Luster. I thought it would build on the shine but did just the opposite. This is when I realized that nothing tops a good glaze for a show bike quality shine.
Keep in mind, glazes are not permanent, and need to be re-applied every so often. I re-apply glaze to my tins about every time I clean the bike, and it only takes about 3-5 minutes.
Good luck!