A typical can of WD-40.
A typical can of WD-40.
There are many claimed uses for WD-40. I'm only going to recommend two,
because these are the two that I have used successfully over many decades.
But that is not to say that there are not other good uses for it.
So, as the title says, WD-40 is useful as a lubricant (especially for metal)
and as a rust remover.
Avoid contact of WD-40 with your body. Use in well-ventilated area,
preferably outside.
Use this product sparingly at first, because a little may accomplish what
you want.
For rust: Spray directly on the rusty object or on a paper towel then
apply to rust. Wipe off excess product or wipe off excess product with
some rust. Repeat procedure as needed.
For gummed-up metal joints: Spray directly on the gummed-up or sticky area.
Wipe off with old towel or paper towel.
If you find that your cupboard hinges or door hinges squeak and/or are more
resistant to moving than they should be, you can apply a little WD-40 directly
to them. But be prepared to wipe up any dripping product. Put paper or plastic on
ground or counter underneath to protect rugs from excess product dripping onto it.
For gummed-up metal contacts: Especially in metal locks. If a metal lock becomes
progressively more difficult to open with a key, a little WD-40 sprayed into the
lock (or even onto the key) may loosen it for easier opening. Car door locks and
house or apartment locks exposed to the outside air are more likely to suffer from
this kind of stuckness.
Try to use WD-40 only in well-ventilated areas. My practice is not to throw out any
towel or paper towel that has WD-40 on it until it has thoroughly dried.