Yes, Eco Orange can be used to remove most spores, molds and fungi. We recommend a 20:1 ratio but can be increased as needed.
Here’s the thing about artillery fungus, it will permanently stain, so even though Eco Orange kills the germs, spores and mold, it may not take away the stain depending on how aggravating the fungus is. Even straight bleach will fail at times to remove the stain if it’s bad. Your only choice after disinfecting the fungus, in such cases where the fungus leaves a stain, is to repaint.