We’ve put together this simple step-by-step guide to help you clean it effectively.
Spray WD-40. Spray a heavy coat of WD-40, a lubricant that can be bought at any hardware store. Let it sit for 10- 15 minutes, or maybe more depending on how stubborn and old the marks are.
Use a scraper. A scraper or a putty knife will be useful to scrape the paint off. Scratch it vigorously for a minute or so.
Wash. Wash the surface with some Vim dishwash gel and water to clean off the residue and rinse it with water.