Posted: Sat May 26, 2018 12:30pm
Having done car detailing for some time now I can confirm that anything that doesn't remove the dirt/sand/fine grit before applying any pressure is going to damage the protective coating (polish and possibly lacquer) of any paintwork, often without being immediately visible to the eye. I can however say that the Miracle Dry Wash (IF it is the manual pump version I am thinking of) that was put together in collaboration with an F1 team provides amazing and excellent results!
Its a wet application but my advice to anyone using it is to rinse your application cloth very regularly or, as 'JimTaylor' points out, it IS doing damage to the finish. You see the 'Halo' effect on most cars in the sunshine.
My choice for this product is for spot application on a fairly clean vehicle, for people on the go (such as chauffeurs) and will become more expensive if used as the primary cleaning method.
As an alternative, you could try the "AutoRight EZ Wash" (https://www.amazon.com/gp/product/B00GTUPU5K/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&tag=cstareg-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B00GTUPU5K&linkId=747833f1f77166c7c6df9a1af5951a8b) which is an equally excellent product and suitable for locations where water isn't readily available.
Please note though - DONT place the head directly on the floor... which in turn picks up grit and gravel which in turn you then rub all over your car!!!
Hope it helps, its just a viewpoint. For me though, the stripping and re-application of the final polish is important, remembering that polish only highlights what is below so, for anyone serious about this, I recommend you use a quality clay and re-application of surface protector and a final polish covering.