The fading you are witnessing is a small but pesky problem with your concrete paving brick.
How to get rust out of concrete pavers.
Scrub battery acid stains with a hard bristle brush.
It took about eight years for it to turn a deep rusty color.
Using the scrub brush scrub the stain using a considerable amount of pressure.
Pour chlorine bleach into a spray bottle.
Rinse the area off with cold water.
For cleaning concrete pour the lemon juice or vinegar directly onto the rust stain and allow it to sit for ten minutes so the ingredients can fully penetrate the rust.
Make sure the surface is clean apply the rust remover or acid following the instructions and safety precautions on the bottle let it sit for five to 10 minutes then scrub and rinse.
General purpose concrete cleaners may help to remove rust stains depending on the type of paving that is installed the effects can vary.
Cutback asphalt and roofing tar use alliance rubber paint and tar remover and follow directions on the bottle.
Wait for a sunny day since sunlight interacts with lemon to make it a more effective cleaning agent.
For particularly stubborn stains rinse the acid away with a pressure washer.
If the stain remains spray on another application of bleach and let it set longer.
Blood candy ketchup mustard and grease drippings from food use liquid dish soap and let penetrate 20 30 minutes.
Concrete paving brick surfaces look stunning when new because all of the sand and small gravel aggregate in the brick are covered with the pigmented cement paste.
Use a brush that s appropriate for your concrete to avoid damaging it.
Sometimes a little vigorous scrubbing with a wire brush and detergent solution can remove the worst of the staining.
My concrete slab got rust stains on it because the lawn sprinklers were fed from a well that was full of iron.
Slice the lemon in half and squeeze the juice directly on the stains.
Treat the rust stains with lemon juice.
Allow it to stay on the stains for five minutes which should not be long enough for it to dry out.
So i worked out a system that was cheap easy and effective although one of the steps did take a bit of elbow grease.
You may also use oxyclean mixed 4 scoops to a gallon of hot water.