Please choose the correct solution to the question: How do you remove whitewash from brick?

Solution1: Dampen the surface of the brick or concrete you want to clean with muriatic acid and then, taking care not to splash, pour the contents of the bucket on to the surface. Leave it on the surface for 10 minutes. After this time you can rub the surface with a soft brush to remove dirt stuck in the brick or concrete.

Solution2: Dampen the surface of the brick or concrete you want to clean with muriatic acid and then, taking care not to splash, pour the contents of the bucket on to the surface. Leave it on the surface for 10 minutes. After this time you can rub the surface with a stiff brush to remove dirt stuck in the brick or concrete.

Answer format: solution1/solution2
Answer: solution2