How to remove bore-hole water stains from exterior walls

Often newly painted walls become stained from bore-hole water. The reason for this is that ground water often contains high levels of iron. This dissolved iron leaves brown stains on surfaces when irrigation water evaporates. Many home-owners resign themselves to the fact that they will have to repaint boundary walls on a regular basis to hide these stains. Fortunately this is not the case as we have a water-based degreaser - Tornado - that contains a metal complexing agent (EDTA) that removes these stains when used to wash the surface. The cost of the degreaser is very low, and the added benefit of having very clean, stain free walls after use is very noticeable. Check with your hardware outlet if they have a product containing EDTA for easy iron-stain removal before you repaint.