Help with streaks on siding

dsnorrod

dsnorrod

New member
Ok guys, I need some more help here. We washed this house a week and a half ago. Used VERY low pressure because of bad oxidation. Downstreamed our usual mix of 50/50 12.5% and water with some roof snot. To take the oxidation off the whole house, we used Russ' BD200 mixed 20:1 applied with a pump up sprayer, brushed, and dwelled about 5 minutes and came back with 1000psi rinse. The oxidation came off great and the customer is happy about that, but we are at a loss when it comes to these faint streaks that became visible after the first wash. I've tried everything I can think of to get these off to no avail. We tried a second application of the BD200, re-soft washing it, spraying a roof strength mix of soap and brushing, high pressure, low pressure, and brushing on F13. WTF is this and can it come off??


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Get some truck wash acid and apply with a pump sprayer.It looks like a tinge of red mud from the picture.That will take it off great with no problems.I would shy away from anything with pottasium hydroxide in it because it will be harder to even out the oxidation if all is satified right now.Just prewet and spray the acid on and you should be fine.
 
I agree it looks like some irrigation rust stains. An alum brightener like a mild phosphoric followed by an alkaline soap (no bleach) should take that right off the surface. The reason for the soap is to neutralize and cause the chemical reaction which will help to break the stains off the surface. (just like two stepping a truck)
 
Really? Rust stains?? The streaks are almost white compared to the siding color. I would have thought rust stains would look like....rust.

BTW...the house has no irrigation. Also, the streaks are only on PART of one side. Not the whole side of the house, just two sections separated by a bay window that does not have them.
 
Mud or better yet could have been dirtdobbers gone wild.Seen that before also.I think you should listen to advice given,or just leave it and tell the customer you can't clean it.I gave you sound advice from something I have seen before.I wouldn't steer you wrong and that other guy that commented I think he has been washing for a little while also.
 
Easy killer. Maybe you took my response as condescending. I wasn't trying to come across that way. I'm just confused because they look nothing like what I would expect from rust/mud/dobbers. I was just trying to double check.
 
From the picture that was what I was thinking as well the coloration makes it look like rust, iron or staind from somthing like the red Georgia clay. Still a two step cleaning may correct the problem, it certainly should not make it any worse.
 
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