Protecting Guitar Strings
WD-40 can help clean the strings of your guitar and keep it safe from damage. How? All you need to do is spray it onto a cloth, hold onto the strings, and then slide your fingers up and down.
Preventing Splinters
Not unlike a varnish, it can also keep your single-stick utensils strong and free from splinters. Whenever you notice your broom, mop, or rake looking worse for wear, you can extend their lives with the use of WD-40.