you'll probably get a couple of month out of it..
you'd be wise to have a read of this:
the cheaper waxes last a few months but for longevity your better off doing it in steps with a different product for each stage
Clay- to remove any bonded contaminants eg tree sap, industrial fallout,
polish- to remove any minor blemishes such as fine scratches
LSP/ sealant a synthetic coating to seal the clean paintwork after polishing and keep it that way
then a Wax on top to give it shine
have a scout on the detailing world website for all you need to know and a hell of a lot more besides but leave before you start suffering from OCD
