UPVC Cleaner

[Mummywheel]

I have some stubborn black marks on my window frames and wondered if any of you wonderful people can recommend a good UPVC cleaner

Yes this is great stuff. Needs a bit of elbow grease but I was amazed at how easily the black and grey ingrained stuff just wiped away.
It looks but doesnt smell like Brasso and seems quite economical to use.