Gradient Stucco?

[HotShot 34]

Hey guys and gals, I'm new to the pressure washing biz, well, sorta. I have had a Hood cleaning company for about 2 years now and it's still going strong, but I've decided to branch off a little into more pressure washing...anyways, my question is "here where I live, just about every house is stucco'd, and there are brand new houses with a brown strip around them at the bottom. I would like to offer a service of cleaning that for people, but I'm not sure how to go about it. Will it come off? What is it? What do I need to do?

Hopefully you can see what I'm talking about in these pictures..

Thanks in advance....

Anthony

[squirtgun 122]

Looks like mud staining or irrigation rust.Oxalic acid should remove it or maybe something like NMD80 from eacochem.

[Jeff 232]

Never seen anything quite like that. Is it mud? its weird how its around the whole place

[HotShot 34]

it's pretty common out here in the desert, and it's really ugly. If there is no sidewalk around the house, this happens. I'm not really sure what it is. Thanks squirtgun, I'll research those chems..

[HotShot 34]

OK....I was told today that it is "iron" from the mud. Does that sound sensible? Would the hot water from the pressure washer take it off alone?

[Jeff 232]

OK....I was told today that it is "iron" from the mud. Does that sound sensible? Would the hot water from the pressure washer take it off alone?

If its Iron Oxalic may very well work

[HotShot 34]

alright....thanks guys, I'll give it a try here in a couple of weeks and let you guys know the results.

[mdspowerwashing 14]

I think the stain is from when the rain hits the clay type of mud/dirt near the house and splashes back at the house. I've been doing a couple stucco homes lately with the same problem. I've tried oxylic acid, with a strong mix with no luck. The only chemical I found to work is a product I buy locally called con-strip. It is a hydrochloric acid mix. It is available through ACR products out of wind gap, pa. His phone number is 610-392-1899. Ask for Tom, and tell him Matt for MDS Power Washing sent you. That is the only product I have used sucessfully, and I have tried other products. I mixed the con-strip(hydrochloric acid) 50/50 with water, and used a pump up sprayer. Let the acid stay on about 1-2 minutes, then rinse off using <800psi. The customers house I did today was overwhelmed with the results. Just make sure you have eye/skin/resparator protection with this product.

[HotShot 34]

Thanks for the post Matt. I had planned on going to the nearest chemical company (which is 70 miles away) tomorrow and buying some oxalic. I may still because it seems everybody on here has about a million different uses for it. I will give Tom a call....thanks a lot.

[HotShot 34]

Matt...I haven't had a chance to call Tom yet, but I was re-reading your post and saw that the con-strip is hydrochloric acid based. Would muriatic acid work? Isn't is hydrochloric acid? Just wondering because muriatic is readily available just about anywhere.

[HotShot 34]

UPDATE

Well, I got to try the acid on the "iron" ring and it worked like a charm :) I ended up using muriatic acid on it and it came right off. Thanks guys for all your help.