These are post I found online...

Is WD-40 Safe On All Surfaces?
WD-40 is safe on almost all surfaces found in your house. The few exceptions include some plastic surfaces that must avoid contact with petroleum-based products. AND

How to Clean Rust Off Cake Decorating Tips
Instructions
Things You'll Need

* WD-40
* Toothbrush

Get what you need for every
project at HomeDepot.com

1.
* 1

Spray WD-40 on the rusted areas of the icing tips. The lubricant breaks down the rust so that it can be removed easily. Let the tips sit with the lubricant on them for two minutes.
* 2

Scrub the rusted areas of the decorating tips with a toothbrush to remove the broken down rust.
* 3

Rinse the rust and lubricant from the tips. Wash the tips in the dishwasher before using.


Read more: How to Clean Rust Off Cake Decorating Tips |


http://www.ehow.com/how_8153563_clean-off-cake-decorating-tips.html


ANY ADVICE TO HOW TRUE THIS IS????

All I can say is those tips are $2-3 each and there's no way I'm going to spend 10 minutes scrubbing if before I buy a new one! lol

I'm not so sure I'd ever use WD40 on anything that came in contact with food. Have you ever gotten that stuff on your hands? It takes forever to get rid of the smell, which means there is still some residue there. Why would a tip be rusty in the first place? Hot soap and water! Dry the tip. Your done.

I would not use WD-40 on food based items..The chemicals in it are not food safe...I'd just throw the old tips out and buy new ones for the minimal cost.

I wouldn't even be able to get past the smell! Besides, that stuff will take rust off of things, but if you scrub off the lubricant from the metal, it will just rust again. The chemicals is what keeps the rust away. I have tons of tips and none of them ever rusted. My dad even gave me mom's tips after she pasted away and they are not rusty. They have been around for a long time (no disrespect mom )

I use WD 40 to clean my stainless steel appliances so I can see how it'd theoretically work but I wouldn't use it for food items either!

I'm generally distrustful of any instructions posted on ehow.com! The WD-40 Material Safety Data Sheet says:

http://www.wd40company.com/files/pdf/msds-wd482671453.pdf

No where does it say it's safe for food contact. The USDA has only approved it as a lubricant for places where there is no food contact.

I know Wilton's tips are nickle plated so they should never rust. They will discolor but not rust.

If I had rust on a tip, I'd just toss it and buy a new one. They aren't that expensive.

Thank you all for posting your comments. I was iffy myself with what the article said.