Very good wax, one of my favourite from the Range, works really well on White and light colours.
Diamond White is a hard wax, and can be applied by either Hand or Applicator Pad (Foam is best). Generally, Foam tends to be a little quicker, you use a little less wax, and a more even application, whereas by Hand, often takes a little longer, although some find it more enjoyable to do it by hand. Apply, then leave the wax for around 10 minutes, usually by the time you have completed the last panel, the first panel is about ready to buff off.
I would recommend applying 2 layers, leave around 1 hour until applying the second layer, this should last around 3 months if you are washing regularly with a pH shampoo such as Born to be Mild.
To get the most from the wax, its probably a good idea to use Dodo Juice Lime Prime first, this is a Pre-Wax Cleanser which prepares the paint for the wax, it gives a high gloss look, as well as helping the wax bond properly to the paintwork.
Hope that helps.
Gaz