Im with jpc on this one, theres a lot of smoke and mirrors and half assed attempts in the waterless world, almost as much as normal detailing
The product descriptions are pretty wild as well, promising the earth but actually delivering a lot of time speant and millions of dirty m/fibres!
Its something i unfortunately have to do now and then on the ferrari, and i exercise extreme caution whilst doing so but you do get slight hazing and light scratches as far as i can tell. Its a necessary evil though
in some situations!