Having a tin of WD40 in the house can save you a bit of money by not having to buy new or repaint etc….Eg: A few years ago my little Van Gogh decided to draw on my walls, now a piece of art it was but not where it should have been drawn 😩 I sprayed WD40 on it and it came off like a hot knife to butter, don’t spray too much otherwise you will get a bit of a grease shine so be careful but it really does work as you can see by the pics…More hints and tips on Wd40 uses in the link
http://www.moneycrashers.com/wd-40-uses/