Hello tadgh
See this nano product stuff u have, does it have to be applied by hand, ( just so I know you see ) and/or do you have something similar that could go through wfp.
I have just cleaned a bit of cladding but there is small sections inside the cladding that is black and these haven't came up as good as the rest. Am looking on going over them again but if only way to apply is by hand then I need a cherry picker
Matt