A lot of Twin Cities homes built in the '60s, '70s, and '80s still wear their original aluminum siding. It holds up surprisingly well — but after a few decades it chalks, fades, and starts looking tired. The question I get is always the same: can you paint it, or is it time to replace?
You can paint it. Aluminum actually takes paint better than vinyl in one important way. Let me explain the right way to do it — and the honest case for when painting isn't the move.
The Short Answer
Yes, you can paint aluminum siding, and it holds paint well if it's prepped right. The two keys are removing the chalky oxidation before you paint, and using a 100% acrylic exterior paint (with a bonding primer on bare or heavily oxidized spots).
And here's the part that surprises people: unlike vinyl, you can paint aluminum a darker color. Aluminum is metal — it doesn't warp or buckle from heat absorption the way vinyl does. So if you've wanted to go from that faded '70s avocado to a deep modern charcoal, aluminum will let you.
Why You Have to De-Chalk First
Aluminum siding oxidizes as it ages. Rub your hand on an old aluminum wall and you'll come away with a powdery, chalky residue — that's the oxidized finish breaking down. Paint will not bond to that chalk. It'll look fine for a season, then peel in sheets.
So the whole job lives or dies on cleaning. You need to wash the siding thoroughly, scrub off the chalk (a deck brush and a TSP or siding-cleaner solution does it), and rinse until your hand comes back clean. This step is more important on aluminum than on almost any other material.
Why Minnesota Adds a Wrinkle
We put exterior paint through a brutal cycle here — -20°F winters, 90°F summers, and the freeze-thaw swings of spring and fall. That movement is hard on adhesion, which is exactly why the de-chalk-and-prime steps matter so much in our climate. Cut a corner on prep in Tennessee and you might get away with it. Cut it here and you'll be repainting in two winters.
Aluminum also dents. Hail, a stray ball, a ladder — it dings, and paint doesn't hide a dent. If your siding is already pocked, paint makes it look freshly pocked.
How to Paint Aluminum Siding the Right Way
- Wash and de-chalk. TSP or siding cleaner, a stiff brush, and a thorough rinse. Keep scrubbing until the chalk is gone.
- Let it dry fully. A dry day plus time. Trapped moisture blisters paint.
- Scuff and spot-prime. Lightly sand any glossy or peeling areas. Prime bare metal and heavily oxidized spots with a bonding or self-etching metal primer.
- Two thin coats of 100% acrylic exterior paint. Spray-and-backroll gives the cleanest finish; brush-and-roll is fine for smaller homes.
- Pick a mild day. 50–85°F, low humidity, out of blazing direct sun so the paint can level before it flashes off.
What It Costs
| Approach | Typical cost (materials + labor) |
|---|---|
| DIY (paint + supplies) | ~$1.00–$3.00 / sq ft |
| Professional repaint | ~$2.00–$4.50 / sq ft |
| New siding (replacement) | ~$8.00–$16.00 / sq ft installed |
On a typical 2,000 sq ft Twin Cities exterior, a pro repaint runs roughly $4,000–$9,000. Aluminum often needs more prep labor than vinyl because of the chalk, which nudges the cost up.
The Honest Part: When to Replace Instead
Most aluminum siding in the Twin Cities is 40-plus years old. That changes the math.
- It's dented everywhere. Paint won't fix dents, and old aluminum dents easily. A heavily dinged wall looks dinged no matter the color.
- It's noisy and offers no insulation value. Aluminum does nothing for your energy bill, and it can be loud in wind and rain. Paint doesn't change that.
- You're committing to a repaint cycle. Once painted, you're on the hook to repaint every 5–10 years. Original baked-on aluminum finish lasted decades.
- The siding is at end of life. If you're spending real money to prep and paint 45-year-old siding, that budget often goes further toward LP SmartSide engineered wood or steel siding — both of which insulate better, resist dents far better, and hold their finish for decades. Compare your options on the best siding materials for Minnesota breakdown.
I've told homeowners to paint and save thousands. I've also told them that painting four-decade-old aluminum is good money chasing bad. It comes down to the condition of what you've got.
Frequently Asked Questions
Can you paint aluminum siding a darker color?
Yes. Unlike vinyl, aluminum is metal and doesn't warp from the extra heat a dark color absorbs, so you can safely go darker. Just prep it correctly — de-chalk thoroughly and prime bare or oxidized areas — and use a 100% acrylic exterior paint. Darker colors will still show fading sooner on south- and west-facing walls.
What kind of paint do you use on aluminum siding?
Use a 100% acrylic exterior latex paint, with a bonding or self-etching metal primer on bare metal and heavily oxidized spots. Acrylic flexes through Minnesota's temperature swings and bonds well to properly-cleaned aluminum. Skip oil-based paints — they're more prone to cracking as the metal expands and contracts.
How do you prep aluminum siding for painting?
Wash it with TSP or a siding cleaner and scrub off the chalky oxidation until your hand comes back clean — this is the most important step. Let it dry completely, lightly scuff glossy or peeling areas, and prime bare metal. Skipping the de-chalk step is the number-one reason painted aluminum peels.
How long does paint last on aluminum siding?
On well-prepped aluminum, expect roughly 5 to 10 years before a repaint in Minnesota. South- and west-facing walls fade first. The original factory finish lasted decades, so once you paint, you're signing up for a recurring repaint cycle.
Is it better to paint or replace aluminum siding?
Paint if the aluminum is sound and you just want a fresh color — it's far cheaper up front. Replace if it's heavily dented, at end of life, or you want better insulation and lower long-term maintenance. Most Twin Cities aluminum is 40+ years old, which tips many homeowners toward replacement with engineered wood or steel.
Does painting aluminum siding help with energy efficiency?
Not really. Aluminum has essentially no insulation value, and paint doesn't change that. If your energy bills are the concern, insulated siding (or adding a foam backer when re-siding) does far more than a coat of paint. Paint is a cosmetic fix, not an energy upgrade.
Joe's Note
Aluminum's one advantage over vinyl is that you can repaint it any color you want — the heat won't hurt it. But don't let that talk you into painting siding that's genuinely worn out. If it's dented, noisy, and four decades old, run the replacement numbers before you buy the paint. I'll give you both reads, straight.
Not sure whether your aluminum siding is worth painting or time to replace? I'll come look, tell you straight, and quote it line by line — no pressure. Call 952-206-6339 or request your free estimate online.
Modern Exterior Systems is a women-owned, family-operated roofing and exterior contractor based in Eden Prairie, MN, serving the Twin Cities metro since 2007. Owner Joe Dvorak brings 20+ years of hands-on construction experience, CertainTeed ShingleMaster and Malarkey Emerald certifications, and a LIFETIME workmanship warranty to every project. BBB Accredited with an A+ rating.