Seems like unless you’re super thorough and maybe redo it every couple years, it’s always gonna be a bit of a gamble.
That’s been my experience too, honestly. I painted the old aluminum frames on our 70s ranch about five years back. I went all in—scrubbed them down, used a wire brush to get rid of every bit of chalky oxidation, then hit them with self-etching primer. Even so, I started seeing some flaking after about three years, especially where the rain hits hardest. It’s not terrible, but it’s definitely not “set it and forget it” like painting wood trim.
I’ve heard powder coating is way tougher—my neighbor had his done when he replaced some basement windows and those still look brand new. But yeah, that’s a whole different ballgame unless you want to take the windows out and haul them somewhere (not happening for me). Plus, cost-wise, it adds up fast.
One thing that helped me was using a really good exterior paint over the primer—something meant for metal. The hardware store guy swore by it and I think that did help stretch out the lifespan a little. Still, like you said, even with all that effort, you’re probably looking at touch-ups or redoing every few years if you want them to keep looking sharp.
If you’re just tired of the old color or want to freshen things up without replacing the whole window, painting’s decent as long as you set your expectations. Don’t skip the prep or primer part though...I tried shortcutting that on one window and regretted it pretty quick.
Curious if anyone’s tried any of those new “direct-to-metal” paints? I keep seeing ads but haven’t talked to someone who used them on aluminum yet.
I went down the “direct-to-metal” paint rabbit hole last summer after the usual peeling showed up again on my back windows. Gave one of those newer brands a shot—figured it couldn’t be worse than my last attempt. Honestly, it went on smoother than I expected, but I can’t say it’s a miracle fix. The prep still took forever (scraping, sanding, cursing at the old caulk), and I’m already seeing a couple tiny chips where the dog’s leash hits the frame. Maybe it’ll hold up better than the standard stuff, but I’m not holding my breath.
I agree, powder coating would be awesome if it didn’t mean basically removing half my house. Not worth the headache for me. At this point, I just accept that painting aluminum frames is sort of like mowing the lawn—never really “done,” just less embarrassing for a while. If you’re picky about looks, be ready to touch up every few years. If not, well...they’re windows. As long as they open and close, I’m calling it a win.