Answer: Artillery fungi spores do not normally structurally damage the houses, cars, plants, etc. they cover. Removing the fungi is virtually impossible. Scrubbing and scraping with tools or washing with soap and water aids somewhat in removal; however, the use of tools or harsh chemicals may damage painted or otherwise colored surfaces. Wish I had better news for you, but power washing, bleach, or even scrubbing will not remove the stains.
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