Posted: 23/11/2013 at 09:27
GillyL wrote (see)
We also have a Karcher,very pleased with it,a word of caution though,OH tried to clean green moss off of old garden bench,it took it off,but also removed the varnish !
There are two similar attachments for the Kärcher (both extend the 'gun' bit into a sort of 'rifle') that should not be mixed up:
One of them delivers a very focused jet that will strip paint, varnish etc.
Don't use it to wash your car!
The other spreads the jet more, but is still very powerful and wrongly used could still do damage, but if used at the correct distance will remove dirt, moss etc without taking off the varnish or paint underneath. It is safest used at a glancing angle to sort of 'cut under' the grime rather than hit it full on.
i would imagine butterflybrain that drives and pathways are strong enough to withstand the strong focused jet - varnished wood and car paint are definitely not!
Hope that helps.