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Hello, I have gotten a Hume door installed and when it came to the painting stage I’m having some trouble. I primed with Zinsser and painted with taubmans exterior paint. The paint is peeling like a plastic protector 😩. What am I doing wrong? Should I strip and sand? Thank you
Welcome to the Bunnings Workshop community @eliamc. It's brilliant to have you join us, and many thanks for your question about painting a door.
I'm so sorry to hear you've experienced this issue.
Just to confirm, from the colour, it looks like the coating on the door. Are we looking at the Zinnser primer under the peeled section? I would have thought the Zinsser primer would be white, not a greenish colour like the Duracote finish on a Hume External Door. Now that I'm taking a second look, I suspect the white Zinsser primer has just absorbed some of the colourant from your top coat. In that case, we can tell it's bonded well, and I suspect the issue is because you've used a soft exterior paint. For a door, I'd typically recommend an enamel paint that is far more robust, like Dulux Aquanamel or an oil-based enamel. Any type of knock or scrape on the door will damage the soft exterior paint and cause it to peel.
How long was the topcoat on there before it received the knocks and damage? If it was only on the for less than a few days, it might not have cured yet, which could also lead to this issue.
Unfortunately, as the topcoat you've used hasn't bonded well to the primer or is too soft for the application, it will need to be sanded off. I'd recommend sticking with the same system of paints, so if there are any further issues, that company can troubleshoot them. If you were to use the Dulux Aquanamel, then I'd recommend sanding back the Zinsser primer too. The Dulux One Step would be the compatible primer.
Remember your PPE, including a face mask and safety glasses.
Please let me know if you have any questions.
Mitchell
Hello @eliamc
I'm curious as well as to why the combination recommended did not work out. Would it be possible for you to please post a photo of the Zinsser and Taubman cans that you used. Can you also please tell me which store did you purchase it from? I'll be more than happy to speak to the paint specialist and discuss the issue.
In regards to repainting the door, I recommend going with MitchellMc's recommendations.
If you have any other questions we can help with, please let us know.
Eric
Hi Eric,
it was at the Brendale store, I am really surprised this happened it does not make much sense to me.
I have peeled the paint just with my hands.
Thanks for those details, @eliamc.
And, can I confirm my theory that the Zinnser is still well adhered to the door, but it's changed its colour from white to green? It's just that the shade of green on the door now looks identical to the Duracote finish on a Hume External Door. I'm not suggesting you didn't use the Zinnser product; it's just the colour is throwing me off, as it looks like an unprimed Duracote door. You'll see what I mean from the image below. Is there any possibly chance that the primer wasn't used?
Mitchell
Hi @eliamc,
Understood. Sorry if this sounds like twenty questions, but in order to resolve the issue, I need to know exactly what has failed. So, same question as before, but now about the peeled sections. There doesn't appear to be the white Zinnser primer on the underside of them either.
Regardless of where the white primer has ended up, if it has not bound to the door surface, then the only explanation I can give is that the Duracote finish was too smooth. Many of our paint suppliers recommend braiding the surface with 180-grit sandpaper so the primer has something to grip onto.
Mitchell
I thought an update was needed, I sanded lightly and repainted. It worked like a dream!
thank you all for your advice!
