Mermaid Scales is a Non-Reactive Glaze: meaning it has a beautiful two-toned look, but it flows less than a reactive glaze would. Non-Reactive glazes hold up well when adding design work on top. Therefore, you can paint Fun Stroke designs/words on top of non-reactive glazes and get a clean, crisp look – no fuzzy edges that can happen with reactive glazes. Also, works nicely with Surface Coats.