I've got a badly scaled up window to sort out, and I'm going to try some vinegar on it, but I was wondering if the vinegar will run off before it's had a chance to react with the scale.
So I thought I might try mixing a little bit of wallpaper paste with it to make it gooey - anybody tried this?
(I know I can try it and see, but I don't want to look like a complete fool if it doesn't work and the customer is home!)