The headstone and monument cleaner I mentioned in my earlier post is D/2 Biological Solution. I understand that this is what is used at Arlington National Cemetary. Hope this is helpful.

We have found on our own family headstones that an annual cleaning with a sprayed-on application of Dawn dishwashing liquid and a light scrub brushing works extremely well and prevents that nasty lichen from forming. No rinsing required - the next rain will take care of that.





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