I was under the impression that if you wanted to rework and re-spray over a powder coated part the following steps should take place for the best results. Please answer these questions for me.
A potential client is sandblasting an aluminum substrate and applying 4–6 mils of a fairly standard white powder. The idea would be to save on powder material, as I would think 2–3 mils over chem film would be a great system. I am looking for information to support this suggestion. Can you also touch on what happens to the chem film when the powder is cured at nearly 400ºF?
We recently took on a job to powder coat subway acoustic panels with a copper metallic powder. We coated the first lot of parts, and the color and appearance on the parts is widely different from one part to another and even from one area of the part to another.
Now that we have had some in the field for a while, we are getting complaints about rust on the steel parts and peeling on the aluminum benches. Do you know what the cause is or how we can prevent these problems?