Collinite is such a hot item that its mostly sold out. Check on these links if it is still available. 476 and 845 are almost same but one is in paste form and other in liquid form.
Application method is simple. Shampoo the car, dry it and start applying collinite very very thin on one panel every time with an application pad. Remove (clear and buff) it after 30-40 seconds with a microfiber towel, then move to next panel. Don't leave it after spreading for long otherwise it will be hard to remove it.
One application is enough for four to six months, though autogeek says enough for one year.
http://www.automarket.pk/product-category/collinite/
http://shop.luxeautospa.biz/shop/collinite-liquid-insulator-wax-845-16-oz/
http://shop.luxeautospa.biz/shop/collinite-super-doublecoat-wax-476-9-oz/