How do you clean a burn mark from cement?
you can try acetone and a brush but heat / fire will pit and discolor concrete..
I would suggest using as high pressure water washer.
formerly you unharness the muriatic acid bomb on your driveway, i might advise renting a 3000psi or better stress washer. device condo yards hire then for roughly 20 dollars a say, or much less for 0.5 an afternoon. Be carefull because of the fact in case you proceed to exist one spot too ling it is going to actual start up eating away the cement.
THIS WILL WORK , BUT IS A VERY DANGEROUS CHEMICAL IF NOT HANDLED CAREFULLY! Most commercial muriatic acid will take the top layer off the cement, but can go further if left on to long You will want to have a hose ready. using a garden sprayer and spray the area very quickly and (be very careful as the cloud that will come off the cement is very toxic and can take your breath away). spray the area with water as this will naturalize the acid and it will be OK to scrub quickly and that should take care of your spot. if your uncombable doing this have a pool person do it for you or someone else do it
