for those that have this water mark problem, you only get them if your car has no wax or polish on it, the sooner you put the wax on the less water marks you are going to get ..
with the car waxed properly, when you do wash the car then rinse off the should be virtualy water free as it will glide off..
trust me i tried it no problems with mine.. even tho it was waxed a day before the Gaydon meet.. (3 months ago) still shining today when washed..
But remember that the car has to be washed in the SHADE if possible if not then after the wash move the car into the shade then use the shammy to clean the windows any any other bits of water on ther car.. as the bodywork is cooler and the shammy will work better..
No streaks, No waterspots.. tried & tested.. 10 out of 10..
Raz, your car needs to get sorted out big time.. forget buying all these products left right & center, use the 3 stage maguirs and you definatly need to do the Stage 1 or else it is completely pointless in using stage 2 or 3.. you get the 1st stage right, you think twice about switching to other products .. trust me on this