Rust spots showing through powder coating finish

Posted: April 5, 2011 By: A D T

Home Forums Ask Eastwood Rust spots showing through powder coating finish

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    A D T

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    I have a job i did for a customer, it’s some handrails for outside a house. they are in full weather conditions. I used a zinc rich primer, and then a polyester top coat ( Black).
    it’s been done for 5 months now and we are getting small pin like specks of rust showing through the powder. We sandblasted the handrails first, then applied a zinc rich primer, then the powder coat black. can anyone tell me what they think this might be?? or what i did wrong??

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