I use rim wax ,its made to withstand the heat generated from your wheels and minimises the brake dust that gathers on your wheels. I find it makes cleaning your alloys that much easier. A lot of normal waxes and sealants are not made to withstand any extreme heat and evaporate easily.
I would not bother with 80 on the wheels, AG SRP and EGP will work fine.
Almost the same here, expect I spray on some Blue Rim Wheel Cleaner and then use the jet wash.chem guys hweel guard is good stuff i dont use anything to clean alloys aprt from a rush and a jetwash