just use harpic limescale remover toilet cleaner cost app. one pound works like a dream protect eyes and any cuts on hands apply with a cloth undiluted then stand and wach its like a miricle all that sh// just melts away then wash off with water also removes rust stains from gel coat kieron
If you read the ingredients on the bottle, it's just like any other over priced prepackaged bottle in the chandlers. It's not the same as oxalic acid, which will remove far more stains and muck than Harpic (or any other limescale remover) as it's far stronger, and is very cheap to boot.
i got a kg from agwoodcare and it lasts for ages. know my local chemist well but he cd not get it from his suplier. agree that others such as limescale remover / harpic do not work as well. the brown stains on my boat just disappeared with oxalic