Another good one is Mother's Naturally Black. Costs about $18 from Repco. Fantastic. Someone posted a picture of 2 x panniers, only one had been done for comparison, on the forum a couple of months ago.
I also use Bar Keeper's Friend to keep the mufflers their original colour. About $13 from Kitchen Warehouse. I've only done them the once and that was after the bike had done about 16,000 k's and the mufflers were really golden coloured. Bike's now done 29,000 and they are still silver.
And I've just tried some ArmorAll Extreme Tyre Shine on the MCL Tip Over Bars. Squirt on, leave for about 10 minutes and wipe off. Brilliant. They gleam like gloss paint. Sorry can't remember the price.
HIGHLY RECOMMEND THEM ALL.
Dave R