I use it on the cladding and so far it's my favorite. 303 makes it look a little darker and doesn't attract dust like an oily Armour All type product (which also means you can use a California Duster on it.) If I use a good soap meant for hand washing cars, I only have to re-apply every 2nd or 3rd wash.

Their website has a section where you can search for local businesses that stock it. I think I paid $14 - $16 for a bottle which is pricey as etlsport mentioned. You can make stuff like this last a loooong time by cutting old rags into small 3"x3" sections for application.