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
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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
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in some situations!