hi iv made my first big mistake in 6 year business i have ruined a driveway or should say 10-15 blocks.I cleaned a driveway went back seal it and there was small area with efflorescence that i need rid off so i used brick acid and rinsed it seamed fine took it away but went back today and u can see small patches were i have poured it on have i taken color out it.Is there anything i can do fix this