The scaly, feathering appearance of our water tank material exudes a rustic, rugged persona. These tanks are still found on farms throughout the country and scatter the New York City skyline. Left alone, the interior faces of tank staves have a feathery, scaly appearance caused from years of use and varying liquid levels. After decades of exposure, the outsides have weathered to varying shades of grey. When milled, wonderful dark purples can appear from years of sediment intake.