I know that using lemon juice and salt on clothing that has rust stains works. It may work for other materials also.
Use your finger. If rust colored dust comes off on your finger then its rust
One product that is made for disolving mineral buildup from tap water is CLR. The letters stand for calcium, lime and rust.
By coating the iron with a protective layer would prevent the iron from being in contact with the moisture and oxygen in the air. However, if part of the protective layer is scraped off, the iron would rust.
Sanding rust off of a metal is a physical change. You are changing the rust's location, but not its chemical structure.
wash it
Use your finger. If rust colored dust comes off on your finger then its rust
One product that is made for disolving mineral buildup from tap water is CLR. The letters stand for calcium, lime and rust.
The difference between normal dirt and a stain is in their difficult to wash off. Normal dirt comes off easily but a stain is a colored patch which penetrative and thus making it hard to remove.
Pull them realy hard
You might try Plastic Welding or LocTite Plastic Bonder.
yes it would be but if you rubbed very hard it could come off
Put the pants into a plastic bag and into the freezer. .... after an hour the gum whill be crystalized and can be scratched off the fabric.
There is almost no way to do this without destroying the plastic. As you didn't say WHAT KIND of plastic, it's hard to be more help.
By coating the iron with a protective layer would prevent the iron from being in contact with the moisture and oxygen in the air. However, if part of the protective layer is scraped off, the iron would rust.
You will need to paint the stain with a pickling gel. It is very rough, but it will get the stain off.
The best way to get rust off of your skin is just to wash it off. It should come right off with soap and water.
A good basic cleaner is baking soda made into a paste. Scrub the stain with the paste then rinse. Spraying with vinegar before rinsing can help lift extra dirt from the surface. Do not use ammonia, it can damage the finish. [I found this out when I mixed ammonia and soap to remove a copper stain on a tub]