On Jan 16, 7:49*pm, Another John wrote:
Hi all

Looking forward to Spring ...

... when I come to clean the white-work(?) of our new porch, built last
year, is there anything that can be recommended to clean it well? Or do
I just use car shampoo or something similar?

Of course I'm aware that various specialist cleaners exist, and indeed
I'm happy to buy one of them, *but I'm wondering if they are simply
expensive "snake oil".

TIA,
John

The inherent problem is that the uPVC is actually pretty porous. They
put a special finish on to seal it. Once the finish weathers off, the
muck gets in and is hard to get out. Takes about five years in my
experience. So you don't want to speed the process with any abrasives
or enthusiastic rubbing. Light touch is the thing. Some of these
industrial cleaners take the finish straight off so it gets mucky
again very quickly. So you only want to use the minimum you can. A
small amount of detegent say. Later you will need the tough stuff when
the finish is gone. They can be waxed with silicone wax to replace it
but it's a tedious job.