I have done it a couple of times and I`m really starting to doubt it`s effectiveness at removing a nice layer of wax.
Perhaps, at the end of 3-4 weeks when the wax is hardly left, it gets the remaining bits off.
With a fresh layer (1-2 weeks old) - it seems that it requires multiple washes to get any decent amount of product off.
I`m starting to think it`s more a myth based on people who maintain their vehicles badly. Sure if you don`t wax every month and after 6 months of no washes - dawn would be very harse on the clear as it`s been exposed to the elements and probably has micro surface abrasions thereby allowing the acidity of Dawn to effect the clear significantly with repeated washes.
For a highly maintained car or even one with has been taken care of several times a year - I highly doubt it effects would be noticed - if it even does anything.
Using a something along the line of a APC+ would be more appropriate in my opinion or Prepsol. :up
Paco
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