Step 1
1. Surface preparation. Method 1: clean by shot blasting, which fires round steel shot at the concrete with air pressure to remove the poor top layer while vacuuming up the debris. Method 2: wash with 10% hydrochloric acid (HCl), made by mixing 3 parts water to 1 part acid (pour the acid into the water), stir gently, pour it over the concrete floor, leave it for about 5-10 minutes, then rinse 1-2 times with clean water. While rinsing, scrub with a stiff brush to remove all dirt. Once you are sure the surface is clean, let it dry completely before painting
