Reading about the power of these Karcher machines makes me glad I've only got a cheapy endorsed by Eddy Irvine and bought from Woolies before they went bust! Mine may have a wonky wheel now but it still works well for blasting the bird mess off the deck, making my plastic guttering white again and just occasionally washing the car.... personally wouldn't be without one.
When these products are advertised, it always seems to be a case of power washing a vehicle on a nice sunny afternoon, using all the various gizmo's also advertised, and surprise surprise you then have a showroom condition vehicle in front of you. What I would suggest, is that you go to one of the regular car 'hand wash' places, and see what the staff do and use there.
I have a number of power washers, from the once available £49.99 B&Q Special to the more powerful petrol engined unit. Generally, if the item as a 'detergent' dispenser provided, then I might use it. But a good old sleeves rolled-up job takes some beating!.
got another question looking at the brush attachments for cleaning the car.
looked at the car wash brush in homebase it seemed too soft to clean the grim off a car especially the the stuff that ends up on the rear of a hatchback.
also looked online at the delta racer rotation brush which looks like it would be better but reviews show the washwax feed will not work with this attachment, and the rotary wash attachment fails to rotate.
i was wondering what brush attachment do you use on the vehicles?