I have been out there a couple of hours here & there heating & scraping off the factory undercoating plus whatever some else has applied over the last 40+ years. This stuff is thick. So far I have scraped off 42 lbs worth & I am still not done yet. I weighed it the other night. I have 4 plastic shopping bags full with 10-12lbs each in them. Every pound here or there helps. Going to repaint the floor pans & detail everything underneath as I go.