DO IT YOURSELF
The metal roof received two coats of paint, applied from different stroke directions.
Here's the freshly painted roof, successfully achieved by a DIY'er.
If you have a terne metal roof like this one, then it has probably been repainted several times over the years. Although it isn't recommended to use a metal implement to scrape the roof, it was the only way to remove the loose rust and old paint. Be extremely careful not to pierce the metal when scraping. Also, check in advance with your local authorities about any municipal regulations regarding scraping and repainting a metal roof.
BE CAREFUL WHEN SCRAPING!
work. I realize that most people paint their houses during the summer months but a metal roof is just too hot to work on, or to even touch, during the summer months. I recommend that you begin scraping it during the later winter or very early spring and do the painting during the milder spring months while there are still cool mornings and temperate days. EHT