dried paint off of concrete

[Easyscor]

IF you're able to dissolve the paint with a solvent, it'll wick into the surrounding concrete. That will leave you with ROC's plan B as a reasonably inexpensive option.

[MrRiplEy[H]]

OK thank you gentlemen for the responses. It does appear as though even that muriatic acid has taken a layer off the top and as said exposed the under aggregate. I won't be experimenting in anything but tiny areas.

The areas with paint are drops and in some spots heavier, like the painter didn't get the brush to wood in time after it was just dipped. The concrete is very old, like 30yrs maybe, maybe more, but has been well kept over those years.

I might try some of the suggestions on single drops to see the result.

Could gasoline really be effective if paint thinner was not?


TY
Rot

Once the paint dries in the pores of the cement my guess is nothing but heavy sanding is going to remove it. Paint removal liquid works only on flat surfaces which allow you to peal the paint off with a spatula - porous surfaces are way way harder as you can't reach the insides of the pores. Perhaps paint stripper + heavy brushing with a steel brush. That's going to leave marks on the concrete though. I'd say you're SOL - do this or that you're going to have to have it resurfaced.

[mechanic]

Unfortunately if it is regular churned concrete made from dust and ballast then there is no way that will work other than removing the area that the paint has soaked into. As mentioned the concrete is like a sponge. Effectively your driveway has been tattooed. Depending on the consistency of the top layer and the amount of paint, it could have soaked in up to an inch or more. If you're lucky, the very best scenario is you'll have to brush or chip away at least a few mm of concrete.

[pipz]

You guys are going about this all wrong. Simple solution. Paint the whole driveway.   

[Widewing]

Go here:

http://www.familyhandyman.com/garage/removing-oil-paint-and-other-concrete-stains/view-all

[Meatwad]

[Copprhed]

If the paint is latex, denatured alcohol will disolve it, then use a pressure washer to remove any remains. Withoil based paint that has dried, stripper and pressure washer will do the trick.

[Megalodon]

You guys are going about this all wrong. Simple solution. Paint the whole driveway.   

 Naaaa............. 

[ROC]

^^^
That is a simply beautiful drive right there.

[Reschke]

Having worked with concrete for years you sir have a problem that is going to drive you nuts. It will most likely never get done to your satisfaction and anything you try is going to create a problem eventually. Acids will eat away the top layer and everything else will be less than satisfactory. You may have to replace the section if it gets to that point or you could look into staining the concrete to match the color or at least cover it up for the most part.

[WEZEL]

(Image removed from quote.)

Ummmmmmmmmmmmm do we want to know where you took that picture 

[puller]

gasoline should take it off...if you use any type of acid be sure to have a bucket of water handy to neutralize the acid after it has set there and boiled for a min...remember people use muriatic acid to etch concrete

[Slate]

   You get what you pay for.    That's why I will do most of the work around my house no one cares about the quality as much as I.
       Waiting 2 years was the problem. You have to be quick in dealing with problems like that.

       I've used some of the floor paint with the sprinkle bits you spread around it works quite well if you really clean the surface.

[puller]

 
       I've used some of the floor paint with the sprinkle bits you spread around it works quite well if you really clean the surface.

That's a really great tip  ...If your going to repaint the concrete using those paint chip sprinkles will really hide a lot...but be sure the paint you buy is a true concrete floor paint not just a floor paint...we ran into this at the lumberyard I worked at a while back...we painted the floor using a floor paint on a concrete floor with the paint chip sprinkles and after 3 coats and it drying for a considerable amount of time when we swept...off came the sprinkles  ...and after about 5 weeks of foot traffic and a rain we ended up having to order a concrete/garage floor paint...(there is a big difference)....added more sprinkles and it worked and hid all of the imperfections in the floor....the name of that garage floor paint is like TUFF FLOOR or something to that effect...that other brand we used first, Valspar, was more expensive and looked better, it just didn't work...we later determined that the concrete was sweating so bad it caused the first coats of paint to come off...when a person walked across it you could see their footprints  ...but after we used the TUFF FLOOR paint this didn't occur

That TUFF FLOOR is a really good product and you can get it for different applications, like driveways or interior garage floors...be wary of what you buy from Home Depot or Lowes as that stuff they sell there is junk name brand or not

[Meatwad]

Ummmmmmmmmmmmm do we want to know where you took that picture 

 

The walls have no voices