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I am looking to paint the aluminum siding on my house. It is decent shape for its age. No peeling. I am gig to get it power washed. There are so many different paints out there that say they are for aluminum. Which paint seems to be the best in my situation.
 

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Is it already painted?
If so did they use oil or water based paint?
If it's never been painted before then any 100% Acrylic Latex paint will work.
Never paint aluminum or vinyl siding a dark color.
The higher the sheen the easier to clean and less faiding.
I use Sherwin Williams Duration and never had it fail.
 

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Don't you have to use a bonding primer first?


No bonding primer needed with most acrylics. However, depending on the condition of the siding power washing may not be sufficient prep. If it's heavily oxidized as aluminum often is, especially on the sunny sides, power washing alone may not be enough to remove all the oxidation or "chalk".

A good test is to run your hand across the siding. If your hand comes away looking 'chalky, it's oxidized. In many cases, scrubbing along with washing is required to totally remove the oxidation. In extreme cases, the oxidation of previous coatings is so extreme that's it's virtually impossible to remove it all even with scrubbing. In these cases a stabilizer can be used like Seal Krete Original, or Loxon conditioner. Products like this are made to lock down chalky surfaces and serve as a suitable primer in those situations.

Painting directly over chalk, even a little bit, is almost always a disaster as the paint bonds to the chalk instead of the aluminum and can quickly peel.
 

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No bonding primer needed with most acrylics. However, depending on the condition of the siding power washing may not be sufficient prep. If it's heavily oxidized as aluminum often is, especially on the sunny sides, power washing alone may not be enough to remove all the oxidation or "chalk".

A good test is to run your hand across the siding. If your hand comes away looking 'chalky, it's oxidized. In many cases, scrubbing along with washing is required to totally remove the oxidation. In extreme cases, the oxidation of previous coatings is so extreme that's it's virtually impossible to remove it all even with scrubbing. In these cases a stabilizer can be used like Seal Krete Original, or Loxon conditioner. Products like this are made to lock down chalky surfaces and serve as a suitable primer in those situations.

Painting directly over chalk, even a little bit, is almost always a disaster as the paint bonds to the chalk instead of the aluminum and can quickly peel.
I might be think of aluminum gutters, same answer then?
 

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Aluminum expands and contracts as it heat up and cools down, paint it a dark color and your going to make it worst causing the paint to crack.
Dark colors fade faster and show the dirt sooner.
I've seen it get so hot the paint alligatored.
 
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