Symblast was appointed as contractors to work on a large metal sculpture as part of the Sculpture by the Lakes exhibition . The large metal sculpture was formed by milling. As part of the process a scale is created called “mill scale” which coats the surface. A feature of the exhibit was its changing patina cause by the environment. The presence of mill scale would prevent this from happening. Symblast used sand blasting to sensitively remove the mill scale and enabled it to show its patina as intended by the artist.