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Painting Galvanized Metal

Posted by vic99 (My Page) on
Thu, Jan 26, 06 at 13:59

What's the best way to paint galvanized metal(exterior)? What are the best products?


Follow-Up Postings:

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RE: Painting

Galvanized Metal
Here in UK we use a paint called Calcium Plumbate as primer

Then use ordinary undercoat followed by gloss or whatever

Hope this helps

cog


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RE: Painting Galvanized Metal

vic99
Here in the US, many welding supply distributors carry a spray paint product called Cold Galv. I think is also available in gallon cans for larger jobs. Not sure what your application is?
wiredheart


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RE: Painting Galvanized Metal

wiredheart:

I will be painting galvanized bollards(new). Final coat color will be yellow. Any additional advice will be appreciated.
vic99


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RE: Painting Galvanized Metal

vic99 - Do a GOOGLE search as follows
painting galvanized metal
The first item you see should be by a company called PPG. Go to that site and it will tell you what to do.
wiredheart


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RE: Painting Galvanized Metal

Galvanized metal has a greasy, oily coating to protect it during storage/shipment. This must be removed before it can be painted. Additionally, some sources recommend letting the galvanized surface age before painting it.

Rustoleum carries a latex-base primer that is supposed to be best for galvanized or aluminum surfaces. I am not sure if it is necessary to use a latex top coat, or if this particular application would take a more traditional oil-based enamel.

I have used Rustoleum Red Primer (lead-free) followed by Rustoleum Gloss Black Enamel on weathered and/or once primered flashings and such on my roof. I let the Red Primer weather for a couple of weeks in the summertime to enhance the result. It seemed to work ok, but being on the roof the work doesn't get very close inspection. From the ground, it looks fine.


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RE: Painting Galvanized Metal

Use Ospho, a phosphoric acid solution, to etch the coating, follow the instructions. Then use epoxy paint for a durable finish. I like Ameron 400 because I can use it in small quantities as the mix is 1:1

Thierry


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RE: Painting Galvanized Metal

My elderly neighbor told me just to wipe down the metal with vinegar and then prime and paint as usual.

I haven't tried this yet so you need more input. But, if it works it is a very cheap.


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RE: Painting Galvanized Metal

Can someone confirm that wiping down galvanized steel with vinegar and then painting will work? Can someone who's actual done this comment? I need to pain this steel solar structure that was installed in my backyard!


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