how do you clean a concrete porch, I've used bleach but no luck.
My windshield has some serious streaks on it and I need a quick way to remove them because it causes a visibility problem.
I've power washed, the bricks are clean but the strain still remains. Oil is from bbq pit.
Patio was new 2014 with the normal colors a mix of pink and gray. Was left unattended in south west Florida during July to Sept 2015. 30% turned black. Looks like m... See more