A homeowner in Howell called us last spring with a simple question. He had run his hand along the side of his 1970s ranch and came away with a palm full of white powder.
“What paint do I even use on this stuff?” he asked.
Here is the short version we gave him. The best paint for aluminum siding is a high quality 100% acrylic exterior latex paint, usually in a satin finish, applied over siding that has been cleaned of all chalk. Bare metal spots need a bonding or metal primer first. For a finish that lasts decades, a ceramic elastomeric coating is the step up.
Below we will explain why acrylic works best, when you need a primer, how to deal with chalk, and how to get the job to last through Michigan winters.
The Short Answer: What Paint to Use on Aluminum Siding
Use a premium 100% acrylic exterior latex paint on aluminum siding. Wash off all chalk first, spot prime any bare metal with a bonding or metal primer, and choose a satin sheen. Good prep matters more than the brand. For decades of protection, a professionally applied ceramic coating is the longer lasting option.
Here is what to use on aluminum siding at a glance:
- Paint type: Premium 100% acrylic exterior latex
- Primer rule: Spot prime bare metal, full prime only if chalk will not wash off
- Sheen: Satin for walls, semi gloss for trim
- Prep: Remove every bit of chalk, mildew and dirt
Why 100% Acrylic Latex Is the Best Paint for Aluminum Siding
Acrylic latex is the best paint for aluminum siding for a few practical reasons.
It Flexes as Aluminum Expands and Contracts
Aluminum heats up fast. On a sunny July afternoon, a south wall can get hot to the touch. On a cold January night, the same panels shrink.
That constant movement is hard on paint. A 100% acrylic film stays flexible and moves with the metal instead of cracking.
It Holds Color in UV
Acrylic resins resist UV better than many other paint types. That means better color retention on the walls that take the most sun.
Why Oil Based Topcoats Are Usually Not the Answer
Oil based paints get harder and more brittle as they age. On metal that moves every day, that brittleness can lead to cracking and peeling.
Oil based products still have a place as primers in some situations, which we cover below. As a topcoat, acrylic is usually the better choice.
Examples of Paints Homeowners Use
Premium acrylic exterior lines such as Sherwin Williams SuperPaint or Emerald, and Benjamin Moore Aura, are common choices.
Whatever you pick, check the label. Make sure the product is approved for aluminum or metal siding.
Do You Need a Primer for Aluminum Siding?
This is where a lot of advice online disagrees. Here is a simple way to decide.
When You Can Skip a Full Primer
If the original factory finish is still sound, and you have washed off all of the chalk, you usually do not need to prime the whole house. A good acrylic paint can go directly over the clean factory finish.
When You Must Prime
Prime when you see:
- Bare aluminum showing through
- Heavy chalk that will not fully wash off
- Glossy patches where paint may not grip
Bonding Primer vs Alkyd Primer for Chalky Siding
There are two common approaches for chalky surfaces.
Some painters use an acrylic bonding primer designed for slick or chalky surfaces. Others use an oil based (alkyd) primer, which can help lock down light chalk residue.
Both can work. The right choice depends on the product and the condition of your siding. Follow the primer manufacturer’s instructions for aluminum, and use a topcoat that is compatible with it.
White Oxide on Bare Metal
On bare aluminum, you may see a white, crusty film. That is oxidation.
Remove it with a nonmetallic scouring pad, rinse well, let it dry, then prime that spot with a metal primer before painting.
Chalky Aluminum Siding: The Real Reason Paint Fails
Most paint failures on aluminum siding come back to one thing: chalk that was not removed.
What Chalking Is
Aluminum siding came from the factory with a baked enamel finish. After decades of sun and weather, that finish breaks down into a fine powder on the surface. That powder is chalk.
If you paint over it, the new paint is sticking to powder instead of the siding. It may look fine for a season, then start to peel.
The Palm Test
Rub your palm firmly across the siding, then look at your hand.
- Clean hand: The finish is in good shape
- Light dust: Some chalk, needs a good wash
- Heavy white powder: Lots of chalk, needs a thorough wash and likely a primer
How to Remove Chalk Without Damaging Siding
- Use a siding cleaner and a soft, long handled brush
- Work from the bottom up, then rinse from the top down
- If pressure washing, keep it controlled and do not spray up under the laps
- Rinse thoroughly so no cleaner residue is left behind
- Let the siding dry completely before priming or painting
Our post on whether pressure washing can damage exterior paint explains safe washing in more detail.
Best Sheen for Aluminum Siding
Satin is the most common choice for aluminum siding walls. It hides small dents and waves in the panels and is easy to wash.
Flat hides even more, but it holds dirt and is harder to clean. Semi gloss works well on trim, doors and accents, where you want a little more shine and durability.
How to Paint Aluminum Siding Step by Step
- Inspect for dents, loose panels and failed caulk
- Wash and remove all chalk and mildew
- Let it dry fully, usually at least a day
- Prime bare metal spots, or the whole surface if chalk remains
- Caulk gaps with an exterior acrylic caulk
- Paint two coats of acrylic, brushing paint into the laps
- Inspect in daylight and touch up any thin spots
You can paint aluminum siding with a brush, roller or sprayer. Many painters spray or roll, then back brush to work paint into the edges of each lap.
Best Weather for Painting Aluminum Siding in Michigan
Michigan’s painting season is short, so timing matters.
- Follow the temperature limits on the product label. Many exterior products list roughly 50 to 90 degrees F.
- Avoid painting when rain or heavy dew is expected within about 24 hours.
- Avoid painting dark walls in hot, direct afternoon sun.
- In Livingston County, late May through September is usually the best window.
Watch out for fall evenings. Even if afternoons are warm, heavy dew can settle on fresh paint by dusk.
How Long Does Paint Last on Aluminum Siding?
With good prep and a quality acrylic paint, expect about 6 to 10 years.
South and west walls usually wear first, because they get the most sun. Prep quality, product choice and Michigan winters all affect where you land in that range.
Paint vs a Long Lasting Coating on Aluminum Siding
Painting is a solid option. But if you never want to repaint again, there is another path.
What Rhino Shield Does Differently on Metal
On metal surfaces, Rhino Shield crews apply rust inhibiting primers first where needed, as described on our surface prep and repairs page. Then the ceramic elastomeric finish coat goes on 8 to 9 times thicker than latex paint.
It comes with a 25 year transferable warranty against cracking, chipping and peeling.
Side by Side
| Factor | Acrylic paint (DIY or painter) | Rhino Shield coating |
| Typical lifespan | About 6 to 10 years | Warranted 25 years against cracking, chipping, peeling |
| Film build | Standard paint film | 8 to 9 times thicker than latex |
| Prep | Homeowner or painter | Full clean, repairs, primer by trained crew |
| Who applies | Anyone | Authorized dealer crew only |
| Upfront cost | Lower | Higher, about 2 to 2.5 times a paint job |
| Long term cost | Repaint cycles add up | One installation plus annual washing |
When Painting Is the Better Choice
Painting usually makes more sense if:
- You plan to sell soon
- Your budget is tight
- You enjoy doing the work yourself
Our Experience With Aluminum Siding Homes in Livingston County
A lot of homes around Brighton, Howell, Fowlerville and Pinckney were built in the 1960s through the 1980s. Aluminum siding was everywhere back then, and much of it is still on the walls today.
When our crews show up on those homes, we keep seeing the same things:
- Heavy chalk on south walls, light chalk on north walls
- Hail dents on the sides facing west
- Loose corner caps that rattle in the wind
- Failed caulk where panels meet J channel around windows
- Brown streaks below the eaves from ice dams
Our process on those homes is the same every time. Wash thoroughly. Refasten anything loose. Spot prime bare metal. Then coat.
Here is something that surprises a lot of homeowners. Aluminum siding is often in better structural shape than people think. The panels usually outlive the finish. The finish is what fails, and that is fixable.
Paint, Coat or Replace Aluminum Siding?
A quick way to decide:
- Dents, holes and loose panels everywhere: Consider replacement
- Sound panels with a tired, chalky finish: Paint or coat
- Sound panels and you plan to stay for many years: A long lasting coating is worth pricing
How Much Does It Cost to Paint Aluminum Siding?
Professional painting of aluminum siding is often quoted around $3 to $4 per sq ft of siding, though it varies a lot by house size, prep and region.
Rhino Shield typically runs about $6.50 to $9.00 per sq ft of wall area, based on our pricing page.
The real comparison is over time. A paint job repeated every 6 to 10 years adds up. A coating designed to last 25 years with an annual wash changes that math. Our Rhino Shield cost in Michigan guide breaks it down.
Frequently Asked Questions
Can you paint aluminum siding with a roller?
Yes. A roller works well on aluminum siding, especially with a nap made for smooth surfaces. Brush paint into the bottom edge of each lap so no spots are missed. Many pros spray or roll first, then back brush for even coverage.
Do you have to prime aluminum siding?
Not always. If the factory finish is sound and all chalk is washed off, a quality acrylic paint can go on directly. Prime any bare metal spots, and prime the whole surface if chalk will not fully wash off. Always follow the primer’s label for aluminum.
What color paint is best for aluminum siding?
Light and mid tone colors usually hold up best on aluminum siding, especially on south and west walls. They absorb less heat and show fading less. If you want a darker color, choose a premium acrylic with strong UV resistance and expect sunny walls to show wear first.
Can you use elastomeric paint on aluminum siding?
Yes, some elastomeric products are approved for metal siding. Check the label, and make sure the surface is cleaned of chalk and primed as the maker directs. A professionally applied ceramic elastomeric coating with a rust inhibiting primer is another option.
Will paint stick to oxidized aluminum siding?
Not reliably. Paint applied over chalk or oxidation sticks to the powder, not the siding, and can peel early. Wash off all chalk, remove white oxide from bare spots with a nonmetallic pad, and prime where needed before painting.
Can you paint aluminum siding in the fall in Michigan?
Yes, in early fall if temperatures stay within the product’s limits and there is no rain or heavy dew in the forecast for about 24 hours. Start painting after the morning dew dries and stop early enough for paint to set before evening.
How do you fix a dent in aluminum siding before painting?
Small dents can often be filled with an exterior grade filler made for metal, sanded smooth and spot primed. Larger dents or holes may mean replacing the panel. Fix all damage before painting, since paint will not hide it.
Want Your Aluminum Siding Done Once?
If you are looking for the best paint for aluminum siding because you are tired of chalky walls, painting is a good choice. But if you would rather have it done once and not think about it for decades, let us take a look.
We offer a free estimate, our color visualizer to preview colors, and 0% financing.
Call (810) 360 6583 or schedule a free estimate. We serve Brighton, Howell, Fowlerville, Pinckney and all of Livingston County, along with more than 40 lower Michigan counties.
Written by Marc Mercier, Owner, Rhino Shield of Michigan. Family owned, 2,000+ installations, BBB A+, Rhino Shield Dealer of the Year, MI License #2102200455.