[stevieg]

Hi All,i have been asked by an existing customer to clean the cladding. This is the vinyl type cladding favoured on modern buildings. The surface dirt will come off but there are black lines that wont. Anybody have any idea what i could put in my tank to do this job or some solution that i could use if i have to do it by hand(it is a large building so would prefer the former to the latter solution)
Thanks.