Then I started removing 47 years of accumulated roof coating of various types. I used kerosene to soften it, but that ran all down the sides, so I mixed up some napalm, which worked better but took a huge amount of styrofoam to make a small amount. Finally just did the scraping on very hot days with small amount of kero. Then removed the oil film with brake cleaner and painted it with Calcor roof coating. I still have half of that to do.