Invested in a Karcher last week. Was initially a bit worried about using the brush attachment. I know it's designed for car paint but it felt a bit coarse to me and I was concerned it would scratch the paintwork of my Cupra. So, naturally I tested it out on the other half's Corsa first. Trouble is, her Corsa is scratched to buggery anyway, where she has driven too close to hedgerows (and kerbed the alloys...) so I wasn't sure whether the Karcher brush did any damage or not. So, has anyone else got one - and do they have any opinions on whether they do more harm than good?