Autoglym Super Resin Polish is good I find, plus it's easy to use. If I'm really going for a good shine then I'll use Autoglym Ultra Deep Shine and Extra Gloss Protection afterwards.
I find that Mer gives a longer lasting shine than Autoglym super resin, but you need more time, as you do need to put a bit more effort in. Also, Mer isn't one that you can really use in hot sunshine.
_________________________