Gyazo has a minimal user interface consisting of a small set of options available by right clicking the taskbar icon. Launching the application displays a crosshair cursor with which the user selects the area to be uploaded.
Surprisingly, many people think of metal roofs as having limited color options. Perhaps they think the color matches the type of metal. Silver for steel, tin and aluminum; reddish-brown for copper; dark gray for lead. As if those are the extent of the color options.
Use 5725 DTM Acrylic Metal Primer/Finish to prime either galvanized or ferrous metal. The 5725 DTM Acrylic Metal Primer is available in 100 White, 120 Red Oxide and 569 Black. You can achieve a satin finish with two coats.