Also check in advance with your local authorities about any municipal regulations regarding scraping and repainting a metal roof.
How to remove paint on roof.
This sandblasting gun can be used with either sand or soda.
Scrape the paint off using either a hand held paint scraping tool or an abrasive paint removing disk on a drill.
Dish soap and a safety razor blade can remove even old dried on paint.
How to remove paint from asphalt shingles.
Use enough to completely wet.
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.
Wet a rag with paint stripper or paint remover and blot the surface of the paint with the rag.
Be extremely careful not to pierce the metal when scraping.
Mix dish soap with warm water until sudsy and thoroughly wet the window with a sponge or rag.
This is the most labor intensive way to remove elastomeric paint.
Within ten minutes the detached paint on the tin roof can literally be peeled away with a paint scraper.
Peel it clearly defines what you see happening in front of your eyes as the old paint peels off the target surface.
If i made this mistake and homeowner was amenable to a decent but not perfect repair job i would look by testing and chemistry for a paint remover that would take the paint off but not attack asphalt or whatever your roof is made of then use a very stiff brush wetted slightly with paint remover and work from bottom to top brushing and dabbing with paper towels to remove the paint then immediately flooding that area with water so the solvent could not attack the shingles significantly.
Do not scrub with the rag because that.
Place several drops of rubbing alcohol onto the surface of the paint.