How to remove dried on cement in wheel wells?

[imported_becks]

Hey guys,



I was detailing a car and the wheel wells were covered in little spots that looked like dried on cement or something. The owner lives in a new development and they drove over cement or something because it`s hard as a rock and I couldn`t get it off. I tried some APC, clay and nothing even made a dent on it :think: Does anyone have any idea how I could get it off?



Thanks

[JeffM]

You will have to use an acid.



You might have some success soaking it with vinager.

[Boongie]

You may want to try very carefully scraping them off with a small flexible putty knife.

[imported_themightytimmah]

Painted wells - concrete remover, I forgot who makes it.

Black plastic wells - spraypaint over it with black spray.

[Setec Astronomy]

Painted wells - concrete remover, I forgot who makes it.

Black plastic wells - spraypaint over it with black spray.



I would think that would be the opposite--that paint wouldn`t stick that well to the plastic, and that painting the painted well would be the thing to do, as the concrete remover might also affect the paint?

[imported_becks]

Thanks for the tips, in regards to painting the wells, I would only do that as a last resort as it would still look bad because it`s all bumpy.

[imported_themightytimmah]

http://www.safe-react.com/combo.htm. These guys sell a concrete remover, make sure to wear gloves and a mask with it. It does the job though, or so I`ve heard.

[toyota2]

You could also try a pressure sprayer just be careful with it. I would think it would take them right off.

[Justin Horne]

You could also try a pressure sprayer just be careful with it. I would think it would take them right off.

Yep, that will work. I did that to my dad`s truck. Just use the high pressure stream, take your time, and be sure to note the difference between dark concrete and undercoating.. Took me a few seconds to figure that out, glad I did... :nervous:

[imported_mirrorfinishman]

You might have some success soaking it with vinager.



Sounds like a good idea. White vinegar usually works very well at dissolving dried cement.

[Mazz]

If the wheels wells are plastic try to bend them a bit and see if it breaks off (you may need to remove some bolts) if they are painted there are a few cement, etc removers out there.

[imported_becks]

I`m going to try the vinegar first and see what happens, since all the cement removers I`ve found also remove paint. Since this isn`t my car, painting will be the "if all else fails option"