The Answer May Surprise You. Often a topic of great conjecture between roof restoration and paint companies is the topic of repainting of terracotta roof tiles. Dealing with difficult surfaces such as unglazed, glazed and vitrified terracotta roof tiles and ensuring an enduring, lasting serviceable finish has been a challenge in the terracotta roof restoration industry. The common misconception that these types of roof tiles cannot be coated is now indeed a myth. Nutech Paint..