Onions - food or medicine?

I always check the validity of all those "warning emails" when I receive one in my email box. I just received an email that talked about onions being a cure for the flu virus. I tried googling to see if that was true or just a wives tale. While I didn't find much about the flu and onions, I did find some other interesting uses for onions. Have you ever tried any of these home remedies?

Smell remover
Eliminate the smell of paint from a room by leaving a peeled onion out.

Rust Removal
Slice an onion with a rusty knife and it will clean off the discoloration.

Athlete’s foot soother
Rub a sliced onion on itchy area until it's relieved.

Earache remedy
Put an onion slice over the ear opening until the pain subsides.

Eyewash
If there is a speck of dust in your eye, chop up an onion and let your tears wash it out.

Natural decongestant
An onion is a natural decongestant. Make some onion juice by slicing and put sugar in it. Swallow.

Smelling salts
Hold a cut onion under the nose of a person who is feeling faint.

Sting soother
If you have been stung by a bee or mosquito, cut an onion in half and hold it on the sting. It will cool the foot and take the pain away.

Wart remover
Rub a stubborn wart with a raw onion dipped in salt; repeat until the wart disappears.

Screen door de-mister
Rub a cut onion on the inside of your screen to prevent it from misting up on a cold morning.