I need to clean smooth concrete drive from the years of work on cars.
It is paint drips of all types. Red oxide, zinc primer ,bitumen underseal, the lot.
The surface is very stable and solid ( 6" thick). I was thinking graffiti remover or similar?
Be careful, some graffiti removers are brick acid which contains methylene chloride and hydrofluoric acid. Get it blasted if pressure washer won't work. Then seal concrete to make future cleaning easier. If you find a safe cleaner please post results.
Yes. I don't want acids. I have re bar mesh down there. I have dripped phosphoric acid on it occasionally.
That stuff don't half etch concrete. Blasting is out of the question but it may come to scouring a skin off it with a rotary floor scourer.
