# Oxalic Haze on Shingles **URL:** \ **Category:** Roof Cleaning\ **Created:** [May 11, 2019, 10:09pm UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778 "2019-05-11T22:09:53Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![MDA1775](https://pressurewashingresource.com/community/letter_avatar_proxy/v4/letter/m/9fc348/32.png) [@MDA1775](https://pressurewashingresource.com/community/u/MDA1775)\ **Post date:** [May 11, 2019, 10:09pm UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/1 "2019-05-11T22:09:54Z")
I think I have caused my self a significant problem. I cleaned an AC overflow rust stain using Rust Remover Plus. It did what I have oxalic do which is leave a white haze on the shingles in place of the rust. I did rinse the heck out of it but, no matter at this point. Any idea how to get that off the shingles without destroying them? Thanks for any help. ---
**Author:** ![Racer](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/racer/32/4931_2.png) [@Racer](https://pressurewashingresource.com/community/u/Racer)\ **Post date:** [May 12, 2019, 3:31am UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/2 "2019-05-12T03:31:31Z")
Can of roof matching spray paint. ---
**Author:** ![DisplacedTexan](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/displacedtexan/32/29182_2.png) [@DisplacedTexan](https://pressurewashingresource.com/community/u/DisplacedTexan)\ **Post date:** [May 12, 2019, 3:34am UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/3 "2019-05-12T03:34:31Z")
Gosh I wanted to say that earlier but didn’t for fear of being laughed out of here and banned for eternity. ---
**Author:** ![Racer](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/racer/32/4931_2.png) [@Racer](https://pressurewashingresource.com/community/u/Racer)\ **Post date:** [May 12, 2019, 3:44am UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/4 "2019-05-12T03:44:34Z")
Well Rust Remover Plus is primarily oxalic acid. It’s for cleaning rust off concrete and other hard surfaces. Have no idea why Mark would use on roof. Painting or replacing shingles probably only choices. Could try , respraying that area with SH and see if that would neutralize the OX thus lightening the effect, but that’s probably wishful thinking. ---
**Author:** ![Racer](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/racer/32/4931_2.png) [@Racer](https://pressurewashingresource.com/community/u/Racer)\ **Post date:** [May 12, 2019, 3:52am UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/5 "2019-05-12T03:52:27Z")
F9 is great for rust removal on shingles. Takes about 15 min. ---
**Author:** ![Redjess](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/redjess/32/34375_2.png) [@Redjess](https://pressurewashingresource.com/community/u/Redjess)\ **Post date:** [May 12, 2019, 3:57am UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/6 "2019-05-12T03:57:45Z")
So its calcium oxalate? Maybe apple cider vinegar. ---
**Author:** ![DisplacedTexan](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/displacedtexan/32/29182_2.png) [@DisplacedTexan](https://pressurewashingresource.com/community/u/DisplacedTexan)\ **Post date:** [May 12, 2019, 4:04am UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/7 "2019-05-12T04:04:41Z")
@MDA1775 How big of an area is affected? If it’s reasonably small I’d go with the spray paint idea. If it’s larger then I’d imagine you’ll need to look into some of the other options offered here. ---
**Author:** ![Racer](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/racer/32/4931_2.png) [@Racer](https://pressurewashingresource.com/community/u/Racer)\ **Post date:** [May 12, 2019, 4:16am UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/8 "2019-05-12T04:16:56Z")
I would imagine the haze would get better as time goes by. Just don’t have any idea how long. ---
**Author:** ![MDA1775](https://pressurewashingresource.com/community/letter_avatar_proxy/v4/letter/m/9fc348/32.png) [@MDA1775](https://pressurewashingresource.com/community/u/MDA1775)\ **Post date:** [May 12, 2019, 3:53pm UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/9 "2019-05-12T15:53:26Z")
Where to start. I was treating the painted wall above it and I have used it on shingles before without a problem. Looked great when I was done, not when it dried. I thought about the roof paint idea (i did that several years ago when a knucklehead working for me didn’t properly mask a pergola), unfortunately it is a high end property with multi colored shingles so I am not sure it will work. I am going to try the vinegar idea and do some tests with some of the Eacho chem products since it is a calcium issue. Thanks for the replies and suggestions. Happy Mother’s Day to your Mom’s and your wives. ---
**Author:** ![Redjess](https://pressurewashingresource.com/community/user_avatar/pressurewashingresource.com/redjess/32/34375_2.png) [@Redjess](https://pressurewashingresource.com/community/u/Redjess)\ **Post date:** [May 12, 2019, 4:23pm UTC](https://pressurewashingresource.com/community/t/oxalic-haze-on-shingles/19778/10 "2019-05-12T16:23:20Z")
There is a strong version of vinegar available at local grocery stores, its like 9% acidity white pickling vinegar and usuallly only sold in gallon sizes. All others youll see there are likely only 5% acidity.