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Patina with powder coat

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Metriccar
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Patina with powder coat

Post by Metriccar » Mon Sep 03, 2018 3:06 am

Does anyone do a good patina finish with powder coating? The best I see online is a crinkle type finish. Are there any good patina powder coats out there?

motoguy
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Re: Patina with powder coat

Post by motoguy » Mon Sep 03, 2018 12:30 pm

I use Steel F-X and then powdercoat clear over it.
Bulltear 6x12 w/ Proton Z axis & watertable
CommandCNC/Linux w/ Ohmic & HyT options
Hypertherm Powermax 85 w/ machine torch
Solidworks, Coreldraw X7, Inkscape, Sheetcam

blackandtan
Posts: 206
Joined: Thu Jul 18, 2013 3:05 pm

Re: Patina with powder coat

Post by blackandtan » Mon Nov 19, 2018 9:33 pm

Do you have to do anything special before powder coating over the patinas? What do you do on the back?

nomoreusmc
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Joined: Fri Nov 16, 2018 2:24 pm

Re: Patina with powder coat

Post by nomoreusmc » Tue Nov 20, 2018 6:00 pm

powder coat normally totally encapsulate your part that's why there's no patinas. Paginas are usually done with paint afterwards and some paint can survive the powder coat clear process. If you'd like to know more just PM me

motoguy
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Joined: Tue Aug 25, 2015 12:05 pm
Location: Central MO, USA

Re: Patina with powder coat

Post by motoguy » Tue Nov 20, 2018 10:22 pm

blackandtan wrote:Do you have to do anything special before powder coating over the patinas? What do you do on the back?
Nope. Just make sure it's completely dry before you powder it. This should be done anyway, as leaving the patina finishes wet is an invite for near-instant surface rust. I spray the back with clear as well, just to seal it up.

Warning: The Steel F/X patinas appear to be heat sensitive. You may have to play with your oven to find a good point to clear them. If they're left in too long, or too hot, all the color will wash out to a "piss yellow". It's ugly.

I know my oven runs about 20 degrees above the controller display. I use Clear vision, which is supposed to clear at 400 degrees for 10 minutes. I set my oven to 370 (390 actual), put the part in, and set the timer for 10 minutes. This is a tiny bit undercured (due to the reduced time, and starting timer before PMT), but it gives great results. The difference between a beautiful clear-coated patina part, and a roached-out piss yellow mess, seems to be a matter of a minute or two.
Bulltear 6x12 w/ Proton Z axis & watertable
CommandCNC/Linux w/ Ohmic & HyT options
Hypertherm Powermax 85 w/ machine torch
Solidworks, Coreldraw X7, Inkscape, Sheetcam

blackandtan
Posts: 206
Joined: Thu Jul 18, 2013 3:05 pm

Re: Patina with powder coat

Post by blackandtan » Wed Nov 21, 2018 8:27 am

Thanks for the response. I will do some small test pieces with patina to get an idea how it will turn out. That is one of the biggest reasons that I am trying to get set up to powder coat is for patinas. Two part clear turns out great but the fumes, over spray, gun cleaning and drying time is for the birds.

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