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Default Painting Anodized Aluminium

There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?
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Default Painting Anodized Aluminium

On Mon, 20 Jul 2020 10:49:38 +0100, Andrew
wrote:

There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?


Maybe just some acid-etch primer?

Cheers, T i m
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Default Painting Anodized Aluminium

On Monday, 20 July 2020 10:49:42 UTC+1, Andrew wrote:
There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?


I'd try just cleaning it and painting. Remember, the surface of aluminium is actually aluminium oxide - and with anodised, it is a just thicker layer. Any attempt to use acid or similar will either do nothing or affect the anodised layer.

See how it goes on a bit of kitchen foil? The fitting will almost certainly be better.
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Default Painting Anodized Aluminium

On Monday, 20 July 2020 10:49:42 UTC+1, Andrew wrote:
There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?


Depends how it is sealed most cheap stuff will have a lacquer type finish more exotic is teflon, neither of which are good bases for paint. A rub down with fine wet & dry will remove the top surface but take care the oxide layer is only microns thick and it is easy to rub down to the base metal. Then again if you are painting that may not matter too much.

Richard
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Default Painting Anodized Aluminium

On 20/07/2020 11:41, Tricky Dicky wrote:
On Monday, 20 July 2020 10:49:42 UTC+1, Andrew wrote:
There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?


Depends how it is sealed most cheap stuff will have a lacquer type finish more exotic is teflon, neither of which are good bases for paint. A rub down with fine wet & dry will remove the top surface but take care the oxide layer is only microns thick and it is easy to rub down to the base metal. Then again if you are painting that may not matter too much.

Richard


+1. Just wash and try a bit and see, if it doesn't wet properly then
fine steel wool and if that does not work, wet and dry.


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Default Painting Anodized Aluminium

On 20/07/2020 12:24, newshound wrote:
On 20/07/2020 11:41, Tricky Dicky wrote:
On Monday, 20 July 2020 10:49:42 UTC+1, AndrewÂ* wrote:
There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt
paint?


Depends how it is sealed most cheap stuff will have a lacquer type
finish more exotic is teflon, neither of which are good bases for
paint. A rub down with fine wet & dry will remove the top surface but
take care the oxide layer is only microns thick and it is easy to rub
down to the base metal. Then again if you are painting that may not
matter too much.

Richard


+1. Just wash and try a bit and see, if it doesn't wet properly then
fine steel wool and if that does not work, wet and dry.

That does seem to be the way forward. I have a short sample that I will
experiment on first and report back.
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Default Painting Anodized Aluminium

On Mon, 20 Jul 2020 12:24:12 +0100, newshound wrote:

+1. Just wash and try a bit and see, if it doesn't wet properly then
fine steel wool and if that does not work, wet and dry.


I wouldn't use steel wool, tiny bits will get lodged in the soft ally
and rust these will show through emulsion in time. Wet & dry will be
OK.

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Dave.



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Default Painting Anodized Aluminium

Definitely etch primer as otherwise although anodised surfaces can be
painted, it tends to pull of like a film or bubble if you do not create some
way for it to grip. I know I tried to paint one with a can of car paint,
some mat black and also emulsion and none was very useful.
Brian

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On Mon, 20 Jul 2020 10:49:38 +0100, Andrew
wrote:

There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?


Maybe just some acid-etch primer?

Cheers, T i m



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Default Painting Anodized Aluminium

On 20/07/2020 10:49, Andrew wrote:
There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?


You could paper it first. Use self-adhesive brown paper tape, perhaps.

--
Cheers
Clive


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Default Painting Anodized Aluminium

On Monday, 20 July 2020 13:22:52 UTC+1, Dave Liquorice wrote:
On Mon, 20 Jul 2020 12:24:12 +0100, newshound wrote:

+1. Just wash and try a bit and see, if it doesn't wet properly then
fine steel wool and if that does not work, wet and dry.


I wouldn't use steel wool, tiny bits will get lodged in the soft ally
and rust these will show through emulsion in time. Wet & dry will be
OK.


Iron + Ali + water = ali corrosion. Be cautious of mixing the 2.
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Default Painting Anodized Aluminium

On 20/07/2020 10:49, Andrew wrote:
There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?

oxide layer - anodising - takes pain pretty well, but you probably want
to use something like a car spray undercoat on it first.
Or even an 'acid etch' primer



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Default Painting Anodized Aluminium

Andrew Wrote in message:
There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?


some sort of universal metal primer? Or just try it? Degrease first....
--
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Default Painting Anodized Aluminium

On 20/07/2020 13:22, Dave Liquorice wrote:
On Mon, 20 Jul 2020 12:24:12 +0100, newshound wrote:

+1. Just wash and try a bit and see, if it doesn't wet properly then
fine steel wool and if that does not work, wet and dry.


I wouldn't use steel wool, tiny bits will get lodged in the soft ally
and rust these will show through emulsion in time. Wet & dry will be
OK.

Interesting point. I was just thinking of something abrasive to get
through any lacquer, not expecting to polish back through the anodised
layer. I usually find steel wool more useful than wet and dry on
"profiled" metal. I still think it would be OK for inside use, and
therefore not going to get wet.
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Default Painting Anodized Aluminium

On Tue, 21 Jul 2020 18:15:07 +0100, newshound wrote:

I wouldn't use steel wool, tiny bits will get lodged in the soft

ally
and rust these will show through emulsion in time. Wet & dry will

be
OK.


Interesting point. I was just thinking of something abrasive to get
through any lacquer, not expecting to polish back through the anodised
layer. I usually find steel wool more useful than wet and dry on
"profiled" metal. I still think it would be OK for inside use, and
therefore not going to get wet.


Soft steel wool rusts, it takes the required moisture from the air.
I'd also forgotten about the electrolytic corrosion that takes place
between iron and ali. Just sayin'

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Cheers
Dave.



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