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                         OK, I'll admit to having used this stuff!  
I use it on my 13 year old, very dark blue, fair weather toy, seemed something worth a try. 
Being what it is, the car lives in the garage and mainly suffers from dust, occasional bird muck, squashed bugs and a little mud under the sills, rather than serious dirt.  
This being the first year I've used it my routine has been..... 
Early spring - a thorough good normal wash and polish. 
Every month or so since - a dose of this stuff.  Easy, quick, no nasty swirls / scratches yet (I gave it a good claying etc at end of last year) and a good shine.  
Late autumn will give it another wash and polish. 
My thoughts are ......... I am not subjecting the car to water which may collect in deep recesses in the car promoting rust.  Nor am I spending my time washing and polishing the thing rather than driving it.  
Not the usual daily car which would get much dirtier, so possibly the ideal use for the stuff. 
I will give it a good thinking about at the end of the year or end of bottle whichever comes first. 
Confession over! 
  
  
                            
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