How to remove water stone from acrylic:
Fill the bath, at a temperature of + 25 ° C, the water should cover all the deposits + 50mm. Add one and a half liters of the 7th vinegar to it and mix everything. Leave the composition for 12 hours. After drain the water and rinse the bath well with a soap solution, rinse from the shower mixer and wipe it dry. This method can be used once a year; If you often use it, then you can get rid of both water stone and acrylic coating.