If rust appears on the bathtub, it is due to the low quality of the tap water and, possibly, to the initial poor condition of the enamel coating.
Expensive means can be used to solve the problem.
Or you can pay attention to a popular method of dealing with rusty stains on plumbing.
Hydrogen peroxide and ammonia will come to the rescue.
The peroxide and ammonia must be mixed. The weight of the second component should be three times greater than the weight of the first.
The prepared liquid should be left in a large glass container for 10 minutes.
You need to dip a sponge into the resulting mixture. Then you need to “go over” the dirty areas of the bathtub with this product.
Do not rush to wash off the used product. The combination of peroxide and ammonia should remain on the surface of the plumbing for at least a quarter of an hour.
Once this time has passed, the bath can be doused with clean water. The temperature of the liquid should not be low.
In most cases, the trick works and the rust stains disappear.
But if the contamination is very serious and old, then one procedure may not be enough. However, the second time the surface of the plumbing should become clean and snow-white.
Before wiping the bathtub with ammonia and hydrogen peroxide, you need to put on household gloves.