Main Takeaway Points
- Plaster Stains are far more difficult to remove than to prevent.
- Water from rains are different in composition storm by storm, do not assume conditions are always the same.
- Organic material will stain plaster if allowed to sit for too long.
- Metals will stain plaster and are far more difficult to remove without corrective action.
- pH is the most significant factor when dealing with stains (too high or too low)