Ageing/weathering patched in new paint

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A section of render on the side of our house was damaged when we were having the coping stones of the flat roof replaced on our extension. It's been repair patched but where it has been painted it now looks glaringly white compared to the rest of the render. Its right on the most visible bit of the house and is about a foot long in a big wedge that looks dreadful. It also makes the rest of the (actually pretty clean) render look filthy and patchy and a bit damp (which it's not, its just older and has natural weathering). Our house is about to go on the market and i'm worried it will make people thing the house is damp or that there is something wrong. But the house is huge and three storeys high so painting the whole side again is out of the question as it'd cost a fortune. I really want to try and weather the new patch to make it less noticeable but I can't work out what to do. The new bit has been painted in Dulux Weathershield which seems pretty slick and my experiments painting dirty water on it have done nothing at all - it just runs off. Any ideas what I can do to make it look a bit more dirty?
 
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How about getting a tape measure, a spirit level, and a pencil, and draw a neat square on the wall and paint it a completely different colour so it looks like it's meant to be there? And fix the house number to it perhaps?
 
OK, off the wall consideration??

How about painting the "new paint" with yogurt, I read somewhere that to rapidly increase the aged look yogurt or cow dung will encourage bacteria to grow and darken down the affected area.

CAUTION ! suggest you do some checking out prior to attempting the foregoing ???

Ken.
 
I tried yoghurt on some new replacement bricks that looked too new, at the recommendation of the builder.

It didn't work.
 
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How about getting a tape measure, a spirit level, and a pencil, and draw a neat square on the wall and paint it a completely different colour so it looks like it's meant to be there? And fix the house number to it perhaps?
I like your thinking, but as its half way up the gable end side wall of a very traditional victorian country house, I don't think its quite the right for this house.
 
I tried yoghurt on some new replacement bricks that looked too new, at the recommendation of the builder.

It didn't work.
That's a shame.

Though probably I need something quicker anyway - house going on the market this week so I need it to change the colour immediately. Probably don't have time to wait for anything to grow unfortunately, but thanks for the suggestion.
 
Would just painting the repair in the same colour paint but in the shape of a perfect circle be good enough (you could make a pair of compasses to do this).
 
Would just painting the repair in the same colour paint but in the shape of a perfect circle be good enough (you could make a pair of compasses to do this).
I'll try and post a photo tomorrow to give some context, but no, I don't think that's an option. It's where the roof of a single storey extension meets the back wall of a three floor house, so it just extends from the edge in about a foot in on the side of the house, but only about a 1/3 of the way up. It's a very big empty white wall (its a huge, 3500 sq foot house), and very very exposed and visible. To paint a circle would be just as visible and weird looking - probably more so to be honest as I can't think why it would be there and you couldn't make a circle anyway due to the location of the patch. The house is very classic and 'country' so it really just needs to just blend in and be invisible. It's either that or do nothing I think.`
 
It's so hard to do something like that, that actually looks natural.

As you point out, it won't stick - yet 5 years of natural fading and grime will.

Pictures may well help.

Could you lightly rub a pencil over it?
 
It's so hard to do something like that, that actually looks natural.

As you point out, it won't stick - yet 5 years of natural fading and grime will.

Pictures may well help.

Could you lightly rub a pencil over it?
Thats a good idea, will try that tomorrow. Can always pressure wash it off again if necessary
 
Maybe you could practice on a scrap piece of wood or something, and hold it to the wall, first.
 
A section of render on the side of our house was damaged when we were having the coping stones of the flat roof replaced on . Any ideas what I can do to make it look a bit more dirty?
roughen with glasspaper and spray on some "Liquid weather " you'll find it on the 'net;)
 
roughen with glasspaper and spray on some "Liquid weather " you'll find it on the 'net;)
I have some liquid weather here already but it gives quite a purpley reddish tint which concerns me on a white background. do you think it’ll be ok? Also says only for porous substrates?
 

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