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.

[Redbeard]

Is this new-ish render or old? Looks like modern thin-coat, in which case I am surprised it's a metal bead, not plastic. The rust will probably come back eventually, whatever barrier paint you use, and trying to paint over it in render colour may leave the bead exposed. Why not dig out the angle bead and buy a plastic bead and a bag of base-coat render, and then cast around on here for someone with a part-tub of 'gritty top-coat' left. If the colour is not a perfect match you can get some masonry paint to go over.