Rust stain on painted brick

[C2damofoj 16]

One of my customers asked me if I could get a rust streak off of his chimney. The whole house is painted brick. Will oxalic acid hurt the paint? The rust streak is from a steel chimney cap and is about 4' long. The homeowner pointed out a place on the I can test some chems, what other than oxalic should I try?

[blizzy 28]

oxy wont do it.

phosphoric goes after rust, good old CLR.

[steven 37]

Believe it or not I Just did a chimney yesterday with rust on it. I used f9 barc and it came out nice. even got rid of the rust on the metal roof.

[C2damofoj 16]

anyone know if oxy, CLR, or F9. will hurt the paint on the brick?

[Craig 111]

F9 will not hurt it, in fact we use it and so do many others to clean painted surfaces, sealed concrete, coatings and even painted wood.

[John T 744]

F9 appears to be everything the claims say it is. Probably the hottest cleaning chemical on the market right now. We used it a couple of times and it worked exactly as advertised.

If you use F9 report back to us how it worked for you so other contractors who visit here get an excellent product to add to their cleaning arsenal:)

[C2damofoj 16]

F9 appears to be everything the claims say it is. Probably the hottest cleaning chemical on the market right now. We used it a couple of times and it worked exactly as advertised.

If you use F9 report back to us how it worked for you so other contractors who visit here get an excellent product to add to their cleaning arsenal:)

I just ordered a gallon of f9, I will post some before and after pics when the job is finished, thanks everyone for helping.

[Craig 111]

F9 appears to be everything the claims say it is. Probably the hottest cleaning chemical on the market right now. We used it a couple of times and it worked exactly as advertised.

If you use F9 report back to us how it worked for you so other contractors who visit here get an excellent product to add to their cleaning arsenal:)

Thanks, John. Our philosophy is to always under promise and over deliver. F9 is the Ferrari of restoration chems and I take it into battle with me often! .. And we win :)

Edited May 19, 2013 by Craig

[Craig 111]

I just ordered a gallon of f9, I will post some before and after pics when the job is finished, thanks everyone for helping.

If you have any questions let me know... Thanks.

[C2damofoj 16]

[ATTACH]20292[/ATTACH] F9 works as promised, very impressed!

[Craig 111]

Excellent to hear. Nice job.

[B.A. 14]

Craig: what about brick that is surfaced colored. Talking about the bricks that are treated or colored after they're fired or baked. Not exactly sure of the process but acids WILL remove that coating. I had to pay $500 for a company that specializes in matching existing brick to come fix our (technicin's boo boo, I would have tested first) boo boo.

Any experience with this?

[Craig 111]

Craig: what about brick that is surfaced colored. Talking about the bricks that are treated or colored after they're fired or baked. Not exactly sure of the process but acids WILL remove that coating. I had to pay $500 for a company that specializes in matching existing brick to come fix our (technicin's boo boo, I would have tested first) boo boo.

Any experience with this?

Ryan, so many variables here. Was it F9 you used or another chem?

[B.A. 14]

Craig: It was OneRestore. (Eachochem)

[Tonyg 14]

Craig: what about brick that is surfaced colored. Talking about the bricks that are treated or colored after they're fired or baked. Not exactly sure of the process but acids WILL remove that coating. I had to pay $500 for a company that specializes in matching existing brick to come fix our (technicin's boo boo, I would have tested first) boo boo.

Any experience with this?

Good question - This customer had a lime faced brick, meaning pressure or heavy chems may/will remove the surface. These pics were 5 years ago and I am working on the neighbors now and noticed it looks much worse. They had since replaced the steel chimney cap and I would like to go back to pick them up again. I was going to use the Saferestore / OneRestore but we decided then it was not worth taking the chance.

[Craig 111]

F9 will work for that. Use normal solution and a very light mist coat. It wont etch it like one restore.

[Craig 111]

Good question - This customer had a lime faced brick, meaning pressure or heavy chems may/will remove the surface. These pics were 5 years ago and I am working on the neighbors now and noticed it looks much worse. They had since replaced the steel chimney cap and I would like to go back to pick them up again. I was going to use the Saferestore / OneRestore but we decided then it was not worth taking the chance.

F9 on that all the way. 1:2 ratio, barely mist it on.. call me if you need further help. Easy.

[Craig 111]

Craig: what about brick that is surfaced colored. Talking about the bricks that are treated or colored after they're fired or baked. Not exactly sure of the process but acids WILL remove that coating. I had to pay $500 for a company that specializes in matching existing brick to come fix our (technicin's boo boo, I would have tested first) boo boo.

Any experience with this?

Acids like HCL or HF not good for that. F9 will work. The only colored stuff we need to be careful of is poorly mixed colored concrete or pavers that are not strong. They use iron oxides in the mix that can get pulled out of the substrate hydrated too quickly. A weak bond between color and surface can be pulled out.