Before and After... Why not to POWERWASH...

Before (L) and After (R)...
Before (L) and After (R)...
Powerwashing stones with chemicals and under pressure risks greater damage and may actually speed up the deterioration process. The above photo shows where an entire cemetery was powerwashed and has removed the natural patina and aging. Notice how there is no longer any detail or natural highlights... it looks washed out!
Before and After - The "low tech" - "conservative" way
Before...
...and after... with careful hand cleaning using a soft bristle brush and water.

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