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PostPosted: Tue Sep 26, 2017 7:56 am 
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Hi,

I have rubbed down some flaky paint on my external wall before I was going to paint (Sandtex Fine Textured Masonry Paint). However it has created a very patchy wall, i tried to paint over the patches, applied 3 or 4 coats on a test section but you can still see the patches. It sort of looks like a map of the world. I attach a picture of a patchy (patch) section along with the end results (after). Any ideas on how to proceed?
Thanks.


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after.jpg
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patch.jpeg
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PostPosted: Tue Sep 26, 2017 11:22 am 
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Looks like the paint is:
- not stirred at all
- cr@p
- not stirred
- cr@p

I have no idea what you would have to do on bare patches, e.g. paint one coat with diluted paint or something else. But what you got has no opacity hence my suspicion it is not stirred well enough, or it is retail version as opposed to sandtex "trade". On your test patches ... you must let the paint dry fully before you recoat. Putting +1 coat of paint on wet paint is still only one coat of paint.

EDIT: Ooops :welcomeuhm:


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PostPosted: Tue Sep 26, 2017 11:39 am 
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Thanks for the response. No it's not the trade version it's this:

https://www.sandtex.co.uk/products/sandtex-fine-textured-masonry-paint/

Are you saying that not stirring it enough would leave those patches then and I thought that Sandtex paint was supposed to be good stuff?


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PostPosted: Tue Sep 26, 2017 12:27 pm 
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davey1 wrote:
Are you saying that not stirring it enough would leave those patches then and I thought that Sandtex paint was supposed to be good stuff?


It does not matter if it is trade version or not in this instance as I doubt a good company would make such a poor product. What you show on teh photo is consistent with paint that has not been mixed. The solids go to the bottom of the tin and you got more water and whatever else on the top. If mixing by hand using a flat stick, you are looking at 5-10 minutes mixing trying to loosen up all the stuff from the bottom. No idea if you have a paddle for a drill. Also I cannot see enough sand in the picture so you are back to mixing.

Finally, is the photo from when the paint dried up or is it still wet? When the paint dries up opacity will increase.

PS. I am only a DIYer and it is 45 years ago since I used textured paint.


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PostPosted: Wed Sep 27, 2017 9:41 pm 
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It's dry in the picture. I mixed the paint up and tried another coat however you can still see the patch.


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PostPosted: Thu Sep 28, 2017 6:20 pm 
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Try another full coat with a longer pile roller. More texture might work.

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