What about dyeing clothes with iron buttons?

​What about dyeing clothes with iron buttons?
Clean the rust on the clothes,
Cleaning agents available: acetic acid (tartaric acid) solution, citric acid solution, vitamin C tablet, laundry rust remover, lacquer powder, iron remover
According to different clothing, choose the following different washing methods:
1, with 15% acetic acid solution (or 15% tartaric acid solution) sprinkled on stains, or rust contaminated parts soaked in the solution about a day in Rio, and then rinse with clean water. Can also use 10% citric acid solution will be soaked in the rust, and then soak into concentrated brine, rub the next day, rinse it.
2, if the white cotton fabric was stained with rust, can use the small spoon to scoop a wisp of oxalic acid on the stains, then sprinkle some warm water, gently rub, then rinse with clean water. Special attention should be paid to the operation, to avoid oxalic acid corrosion clothing, this method can not be used many times.
3, according to the clothing stain, remove some vitamin C tablets crushed into powder, sprinkle in the wet clothes to be rusty, full immersion, vigorously scrubbing times, can remove the rust stains.
4, for clothing on the rust, if not many, can be used clothing derusting remover. Remove the detergent evenly at the contaminated area. After staying on the clothes for 3--5 minutes, rub it several times over and over again. Rinse it several times with clean water until the stain is removed. Attention should be based on the amount of dirt to determine the amount of rust remover, too much, too little is not good.
5, if it is the rust of the wheel hub, can be cleaned with varnish remover. The specific method is to use a half wet half dry cloth to wipe the wheel hub, and then spray up the rust agent, stop for 10--15 minutes, then use soft cloth to wipe clean. If the rust is more serious, you can spray rust remover again, stop for a while and then wipe
.
The easiest way to wash 6, rust by some fresh lemon, squeeze of lemon juice sprinkled on the rust stains on clothes to be soaked in lemon juice after the hand rub, repeated several times, until the rust stain removal, cleaning with soap and water, then wash it clean with water.

PS:1, 2, two methods are used in chemical raw materials, washing rust effect is better, but acid, after all, clothing and hands have a certain corrosive effect, so as little as possible or wear gloves and other protective measures.