Removing stains and dirt - Bathtub and washbasin
Hair dye and cosmetic stains can often be removed with a paste made of potassium acid tartrate and hydrogen peroxide. The stain is rubbed with a coarse paste and allowed to dry on 3 hours. Then rinse the paste and, if it is necessary, repeat the process.
The inside of the bathtub and washbasins are washed with a solution of water with vinegar. Pour 10 spoons (150 ml) cold water into the washer. Add 1 a spoon (15 ml) acetic acid (vinegar). Spray roughly half a square meter at a time, starting from the bottom. Leave for a minute, then rinse with clean water with an additive 1 spoons (15 ml) washing soda, to neutralize the acid.
Traces of rust in a bathtub or washbasin are washed off, by rubbing vigorously with a cloth dipped in undiluted vinegar or remove immediately with a diluted rust remover. You can get it at some hardware stores, and it's worth buying a bottle right away. Gloves are essential, to protect the skin.
A cracked sink can be patched up, to make it last for time, until you replace it. This is done from the bottom. Wash the crack, to remove traces of grease and soap, and then put a waterproof adhesive on it, smoothing out all air bubbles. The whole thing needs to be painted with white paint, and when it dries up, apply a second layer. Do not use the wash basin by 24 hours. Meanwhile, with an epoxy repair putty (available for purchase in metal stores) fill all gaps inside the wash basin.