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Clear on copper

6/25/15       
Ed  Member

Website: http://www.thespeedofwood.com

Any idea what to use on sheet copper in a clear. It will end up being inset into a desk top for a writing surface. The copper will be "grained" with 180 on a ro sander.

6/25/15       #2: Clear on copper ...
Dennis

I wouldn't count on any finish lasting on copper. As the metal oxidizes the finish could come off. A possible alternative would be some sort of patina process.

6/25/15       #3: Clear on copper ...
Ed  Member

Website: http://www.thespeedofwood.com

Don't want to go with the patina, they want to keep the "bright" copper color. I'm not a metallurgist, but thinking if it's sealed with a finish how can it oxidize?

6/25/15       #4: Clear on copper ...
Bill Miers

Not sure how you plan to do the inset, but why not just use glass as a top? It would be a bit more durable and normal for a desk.

6/25/15       #5: Clear on copper ...
chris

try using google

ColorCopper

6/26/15       #6: Clear on copper ...
Kevin

Sherwin Williams Opex® Clear Lacquer Or Bronzing Lacquer
Opex® Clear Bronzing Lacquer is designed for use on metal surfaces for industrial product finishing.

6/26/15       #7: Clear on copper ...
Ed  Member

Website: http://www.thespeedofwood.com

I did google first, came up with several options. Asking here to see if anyone has 1st hand info. Possibilities are Opex, Breakthrough by PPG, or good old Johnson paste floor wax. He doesn't want glass at all. Any opinions on the 3 options?

6/26/15       #8: Clear on copper ...
Paul Snyder  Member

Ed,

My first choice would be to take the copper to a powder coater and have them clear coat it. It will look great and be very durable.

For the second choice I would use Matthews 2K PU - it's a catalyzed acrylic polyurethane that's equivalent to an automotive paint. You'll need to follow the guidelines and use the products identified in the attached data sheet. Matthew clear comes in satin and gloss.

Click the link below to download the file included with this post.

Matthews_Auto_Paint_Selection_and_Use_Guide.pdf



Click the link below to download the file included with this post.

Matthews_Spray_Bond___Hard_to_coat_metals.pdf

6/28/15       #9: Clear on copper ...
Ed  Member

Website: http://www.thespeedofwood.com

Powder coat is the perfect answer. The person this is for owns a custom steel shop they do all kinds of powder coated finishes on their products. Can't see the forest for the trees! Thanks!

10/5/17       #10: Clear on copper ...
Alex Havens Member

Website: http://www.havensmetal.com

As beautiful as a metal as copper is, clear coating or applying a lacquer is frowned upon where I come from. Copper holds antimicrobial properties and with the ability to self-heal and re patina itself, it's a no brainer to let the finish operate naturally.

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