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Stripping paint off window sills ( concrete)
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aprilsweetheartrose.
Jul 18, 2023, 11:43:08 AM7/18/23
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I need to sort out the exterior of my house. The window sills are all concrete. They have been painted possibly three or four times. I last had them done several years ago and now the paint ( was gloss) is flaking. In some places it is going back to the original concrete. I thought it might be nice to get rid of the pain and just have the original concrete sills but brushing and scrubbing seems to have come to a dead end. Can anyone tell me how to get rid of the coats of pain and go back to the concrete ( it would be nice if there was a product for this ).
Animal
Jul 18, 2023, 5:23:18 PM7/18/23
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On Tuesday, 18 July 2023 at 16:43:08 UTC+1, aprilsweetheartrose. wrote:
> I need to sort out the exterior of my house. The window sills are all concrete. They have been painted possibly three or four times. I last had them done several years ago and now the paint ( was gloss) is flaking. In some places it is going back to the original concrete. I thought it might be nice to get rid of the pain and just have the original concrete sills but brushing and scrubbing seems to have come to a dead end. Can anyone tell me how to get rid of the coats of pain and go back to the concrete ( it would be nice if there was a product for this ).
methylene chloride, for outdoor use only.
> I need to sort out the exterior of my house. The window sills are all concrete. They have been painted possibly three or four times. I last had them done several years ago and now the paint ( was gloss) is flaking. In some places it is going back to the original concrete. I thought it might be nice to get rid of the pain and just have the original concrete sills but brushing and scrubbing seems to have come to a dead end. Can anyone tell me how to get rid of the coats of pain and go back to the concrete ( it would be nice if there was a product for this ).
Heatgun also works
So does a blowtorch, but they're a hazard
All 3 make a mess.
alan_m
Jul 19, 2023, 12:59:13 AM7/19/23
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sandstone (with a hard surface) I found the only effective method was a
blowtorch and scraper and then sanding down the remnants of the
carbonised paint. This does not leave a perfect uniform surface but I
already had to make (cosmetic) repairs and I was going to re-paint from
the outset.
I wasn't too concerned about the existing wooden window frames as this
bit of renovation was in preparation to getting UPVC double glazing
installed.
The bottom layers of paint had been applied probably 50 years before and
I guess had lead.
I first tested with a paint stripper from one of the sheds - one where
you layer it on and then cover with cling film and leave it for a day. I
found it to be somewhat useless at stripping more than a couple of
layers of paint per application and considering how much I would need to
complete the job I'd be poorer by £100s
--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk
aprilsweetheartrose.
Jul 19, 2023, 1:32:46 AM7/19/23
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On Wednesday, July 19, 2023 at 5:59:13 AM UTC+1, alan_m wrote:
> On 18/07/2023 22:23, Animal wrote:
> > On Tuesday, 18 July 2023 at 16:43:08 UTC+1, aprilsweetheartrose. wrote:
> >> I need to sort out the exterior of my house. The window sills are all concrete. They have been painted possibly three or four times. I last had them done several years ago and now the paint ( was gloss) is flaking. In some places it is going back
Thank you all for the replies. I will have to find a heat gun ( I am not sure I could manage a blow torch) . Some of the paint on my window sills must also be around fifty years old. Its needs to go back to the concrete base as paint on paint isnt working now.
> On 18/07/2023 22:23, Animal wrote:
> > On Tuesday, 18 July 2023 at 16:43:08 UTC+1, aprilsweetheartrose. wrote:
> >> I need to sort out the exterior of my house. The window sills are all concrete. They have been painted possibly three or four times. I last had them done several years ago and now the paint ( was gloss) is flaking. In some places it is going back
SH
Jul 19, 2023, 3:47:53 AM7/19/23
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shot/grit blasting gun and supplies of corundum grit.
Great for stripping paint off stone or off wood beams that had been
painted black.
Messy though as you have to clean up the ground.
S.
The Natural Philosopher
Jul 19, 2023, 4:44:47 AM7/19/23
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A wire brush on a drill or angle grinder is quite effective in some
cases, but try it out first.
--
"Anyone who believes that the laws of physics are mere social
conventions is invited to try transgressing those conventions from the
windows of my apartment. (I live on the twenty-first floor.) "
Alan Sokal
SH
Jul 19, 2023, 4:50:53 AM7/19/23
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wood before painting it a light colour :-)
Andy Burns
Jul 19, 2023, 5:59:56 AM7/19/23
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The Natural Philosopher wrote:
> SH wrote:
>
>> grit blasting or shot blasting but this will require the hire of a
>> shot/grit blasting gun and supplies of corundum grit.
>
kiln dried sand (it must be bone dry or it'll clog) e.g
<https://ebay.co.uk/itm/182681884857>
> SH wrote:
>
>> grit blasting or shot blasting but this will require the hire of a
>> shot/grit blasting gun and supplies of corundum grit.
>
> Some pressure washers will do the job with just water.
Or you can get a sand-blasting adapter that will suck up from a bag of
kiln dried sand (it must be bone dry or it'll clog) e.g
<https://ebay.co.uk/itm/182681884857>
Andrew
Jul 19, 2023, 5:10:27 PM7/19/23
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On 19/07/2023 08:47, SH wrote:
https://en.wikipedia.org/wiki/Dry-ice_blasting
This apparently does less damage to the surface of the wood.
There was a Grand Designs conversion of a warehouse (?Hove)
not too long ago where this method was used. Not cheap.
She could always try using a Karcher and see if power jetting
gets any paint off.
Jonathan
Jul 20, 2023, 10:36:00 AM7/20/23
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On Tuesday, 18 July 2023 at 16:43:08 UTC+1, aprilsweetheartrose. wrote:
> I need to sort out the exterior of my house. The window sills are all concrete. They have been painted possibly three or four times. I last had them done several years ago and now the paint ( was gloss) is flaking. In some places it is going back to the original concrete. I thought it might be nice to get rid of the pain and just have the original concrete sills but brushing and scrubbing seems to have come to a dead end. Can anyone tell me how to get rid of the coats of pain and go back to the concrete ( it would be nice if there was a product for this ).
Metal sanding disc
Jonathan
Vir Campestris
Jul 22, 2023, 5:44:05 AM7/22/23
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On 19/07/2023 22:10, Andrew wrote:
>>
>
> A better way is blasting the timber with solid CO2 pellets -
>
> https://en.wikipedia.org/wiki/Dry-ice_blasting
>
> This apparently does less damage to the surface of the wood.
>
> There was a Grand Designs conversion of a warehouse (?Hove)
> not too long ago where this method was used. Not cheap.
>
> She could always try using a Karcher and see if power jetting
> gets any paint off.
Some ***** in the past painted a lot of the internal beams in our house
>>
>
> A better way is blasting the timber with solid CO2 pellets -
>
> https://en.wikipedia.org/wiki/Dry-ice_blasting
>
> This apparently does less damage to the surface of the wood.
>
> There was a Grand Designs conversion of a warehouse (?Hove)
> not too long ago where this method was used. Not cheap.
>
> She could always try using a Karcher and see if power jetting
> gets any paint off.
black. There's a little item in the back of my mind that we ought to get
them stripped.
AIUI the great advantage of dry ice blasting is that you don't have to
sweep it up later - it just vanished all on its own.
Nobody seems to mention sweeping up the paint dust. Though I'm sure
that's not such a big problem as loads of sand.
My son's house has window cills of either concrete or some sort of
stone, and I have the same problem; I've cleaned them as best as I can
but there's no way I'll get it good enough to be bare. On my list is
putting some new paint on them.
Andy
The Natural Philosopher
Jul 22, 2023, 5:49:20 AM7/22/23
to
On 22/07/2023 10:43, Vir Campestris wrote:
> On 19/07/2023 22:10, Andrew wrote:
>>>
>>
>> A better way is blasting the timber with solid CO2 pellets -
>>
>> https://en.wikipedia.org/wiki/Dry-ice_blasting
>>
>> This apparently does less damage to the surface of the wood.
>>
>> There was a Grand Designs conversion of a warehouse (?Hove)
>> not too long ago where this method was used. Not cheap.
>>
>> She could always try using a Karcher and see if power jetting
>> gets any paint off.
>
> Some ***** in the past painted a lot of the internal beams in our house
> black. There's a little item in the back of my mind that we ought to get
> them stripped.
>
> AIUI the great advantage of dry ice blasting is that you don't have to
> sweep it up later - it just vanished all on its own.
>
> Nobody seems to mention sweeping up the paint dust. Though I'm sure
> that's not such a big problem as loads of sand.
>
The loads of sand get *everywhere*
> On 19/07/2023 22:10, Andrew wrote:
>>>
>>
>> A better way is blasting the timber with solid CO2 pellets -
>>
>> https://en.wikipedia.org/wiki/Dry-ice_blasting
>>
>> This apparently does less damage to the surface of the wood.
>>
>> There was a Grand Designs conversion of a warehouse (?Hove)
>> not too long ago where this method was used. Not cheap.
>>
>> She could always try using a Karcher and see if power jetting
>> gets any paint off.
>
> Some ***** in the past painted a lot of the internal beams in our house
> black. There's a little item in the back of my mind that we ought to get
> them stripped.
>
> AIUI the great advantage of dry ice blasting is that you don't have to
> sweep it up later - it just vanished all on its own.
>
> Nobody seems to mention sweeping up the paint dust. Though I'm sure
> that's not such a big problem as loads of sand.
>
You want to hermetically seal any room with sheets of polythene and tape
and vacuum thoroughly after doing any grit blasting.
> My son's house has window cills of either concrete or some sort of
> stone, and I have the same problem; I've cleaned them as best as I can
> but there's no way I'll get it good enough to be bare. On my list is
> putting some new paint on them.
>
> Andy
“Politics is the art of looking for trouble, finding it everywhere,
diagnosing it incorrectly and applying the wrong remedies.”
― Groucho Marx
SH
Jul 22, 2023, 6:40:38 AM7/22/23
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On 22/07/2023 10:43, Vir Campestris wrote:
bottle and face breathing mask or you will be asphyixiated....
Vir Campestris
Jul 22, 2023, 10:19:10 AM7/22/23
to
On 22/07/2023 11:40, SH wrote:
> If you do dry ice blasting indoors, you will need to have a oxygen
> bottle and face breathing mask or you will be asphyixiated....
I am extremely unlikely to do any dry ice blasting of any type. I might
> If you do dry ice blasting indoors, you will need to have a oxygen
> bottle and face breathing mask or you will be asphyixiated....
possibly hire someone... And yes, I know, this is uk.d-i-y...
Andy
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