Advice Sought About Cleaning Products and Methods

[Daniel3103]

Hello,

I have three outside areas on my property that I am trying to clean, but it appears that they need specialized cleaning products or methods and I don’t know how to go about these jobs. I am posting here to seek advice from fellow members of this forum. The three problematic areas are illustrated by the photos below.

1. Some rust is appearing on the rendering on a corner of my outside wall. The rust used to cover the whole length of the corner. I have had it chemically cleaned by a professional company, and they have managed to reduce the extent of the rust to the two small patches that you can see on the photo, but they told me they couldn’t remove those two patches. They also told me that if I didn’t do anything further, the rust would spread again. They advised me that the rust was leaking from a metal angle bead fitted underneath the render, and that I needed to put a barrier coat over the rust, and then put some paint over that in the same colour as the render.

Can anybody here advise me about where I can find something to use as a barrier coat, and something else to use as a render-coloured paint to put over it? Does anybody know of any good products to use?

2. My door landing is painted with a red textured paint, and it is easily gathering dust and earth that is sticking to it. I have tried to remove it both with a dry duster and with a damp sponge, but to no avail. Any idea how I can get rid of it?

3. Some slurry powder has fallen onto an Indian stone on my patio and is sticking to it. This happened when I was mixing slurry powder with water in a tub in the area. I put a dustsheet on the ground as protection, and that limited the damage, but some slurry powder still found its way onto the Indian stone, and now I can’t remove it. I have tried both a dry brush and a damp sponge, but it hasn’t had any effect. Any idea how I can get rid of that powder?

Any useful advice would be appreciated.

 

[blup]

Hello,

I have three outside areas on my property that I am trying to clean, but it appears that they need specialized cleaning products or methods and I don’t know how to go about these jobs. I am posting here to seek advice from fellow members of this forum. The three problematic areas are illustrated by the photos below.

1. Some rust is appearing on the rendering on a corner of my outside wall. The rust used to cover the whole length of the corner. I have had it chemically cleaned by a professional company, and they have managed to reduce the extent of the rust to the two small patches that you can see on the photo, but they told me they couldn’t remove those two patches. They also told me that if I didn’t do anything further, the rust would spread again. They advised me that the rust was leaking from a metal angle bead fitted underneath the render, and that I needed to put a barrier coat over the rust, and then put some paint over that in the same colour as the render.

Address the source of the moisture before rubbing down the affected area (overlapping on to sound metal) and use a colour matched hammerite metal paint.

Can anybody here advise me about where I can find something to use as a barrier coat, and something else to use as a render-coloured paint to put over it? Does anybody know of any good products to use?

Hammerite

2. My door landing is painted with a red textured paint, and it is easily gathering dust and earth that is sticking to it. I have tried to remove it both with a dry duster and with a damp sponge, but to no avail. Any idea how I can get rid of it?

Dust and debris will find its way even into products that say they are specialist floor paint. Repainting regularly or covering it are the practical solutions.

3. Some slurry powder has fallen onto an Indian stone on my patio and is sticking to it. This happened when I was mixing slurry powder with water in a tub in the area. I put a dustsheet on the ground as protection, and that limited the damage, but some slurry powder still found its way onto the Indian stone, and now I can’t remove it. I have tried both a dry brush and a damp sponge, but it hasn’t had any effect. Any idea how I can get rid of that powder?

Any useful advice would be appreciated.

It is likely to contain cement that will need acid to remove it, it’s probably safer to replace the affected slabs.

 

[Daniel3103]

Address the source of the moisture before rubbing down the affected area (overlapping on to sound metal) and use a colour matched hammerite metal paint.

The source of the moisture is probably water going up into the wall from the ground below. Is there a way to address that without doing some demolition? The wall was only built a couple of years ago, and the rendering was done last year. Also, I don’t understand why I would use a metal paint, since the metal bead is covered by the render. I wouldn’t be painting straight onto metal.

As for your other advice, I will look into it. Regarding the Indian stone with slurry on, I would rather not replace it, since it is part of a patio that was only fitted a few months ago. There is only one stone affected – I was only working with slurry in one small area and I managed to restrict the spillage to that small area.

 

[blup]

The source of the moisture is probably water going up into the wall from the ground below. Is there a way to address that without doing some demolition? The wall was only built a couple of years ago, and the rendering was done last year. Also, I don’t understand why I would use a metal paint, since the metal bead is covered by the render. I wouldn’t be painting straight onto metal.

A masonry paint for render

As for your other advice, I will look into it. Regarding the Indian stone with slurry on, I would rather not replace it, since it is part of a patio that was only fitted a few months ago. There is only one stone affected – I was only working with slurry in one small area and I managed to restrict the spillage to that small area.

Maybe put a plant pot on it

 

[Daniel3103]

A masonry paint for render

Will that go straight onto the render, or will I need to put a barrier coat as a base layer beforehands to stop the rust coming through the masonry paint?

 

[blup]

Will that go straight onto the render, or will I need to put a barrier coat as a base layer beforehands to stop the rust coming through the masonry paint?

You should sort out the rust first even if that means removing the render and treating the metal. Probably best to get a builder or handyman in if you're not competent to diagnose and undertake the necessary remedial work.

 

[accelerator]

3. Some slurry powder has fallen onto an Indian stone on my patio and is sticking to it.

You can get scrapers that hold a razor blade and scraping it off gently with one of these might be worth trying. However, try on a small bit first as I'm not sure how hard Indian stone is and you don't want to be scratching the underlying stone so proceed with caution.

 

[Mike13]

Brick acid applied to the sandstone slurry splash with an old toothbrush. Hose the acid awaywhen you are done, or stopping for a break. Use some household gloves to stop any splahes making your hands sore while you work ( I personally dont bother with the gloves because I am comfortable with a brief itch before washing off any splashes). Try to keep the brick acid away from the grout, it will weaken it.

 

[Daniel3103]

Brick acid applied to the sandstone slurry splash with an old toothbrush. Hose the acid awaywhen you are done, or stopping for a break. Use some household gloves to stop any splahes making your hands sore while you work ( I personally dont bother with the gloves because I am comfortable with a brief itch before washing off any splashes). Try to keep the brick acid away from the grout, it will weaken it.

You seem to know what you are talking about! Will brick acid not damage the Indian stone, and do you have examples of specific products that would be good to use?

 

[Mike13]

I have an indian stone patio, sandstone is not usually attacked by brick acid, but cement and limestone do get attacked. So start with an inconspicuous bit to get used to using it. Brick acid is hydrochloric acid at a medium strength, varies by supplier, you can usually buy it at almost any of the sheds.

 

[Daniel3103]

I have an indian stone patio, sandstone is not usually attacked by brick acid, but cement and limestone do get attacked. So start with an inconspicuous bit to get used to using it. Brick acid is hydrochloric acid at a medium strength, varies by supplier, you can usually buy it at almost any of the sheds.

In that case, I probably need to figure out what my Indian stones are made of first!

 

[foxhole]

In that case, I probably need to figure out what my Indian stones are made of first!

It’s in the name , Indian sandstone .!