what causes a dull powder coat finish?

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    I recently coated some upper control arms with semi-gloss black #10108. They turned out great, same finish as the Extreme Chassis Black I painted the frame with. I missed a few spots and decided to put a second powder coat on. Now, the control arms are more of a matte black instead of the nice somewhat glossy finish before. One thing that changed was that the oven temp was higer the second time (350-400 the first time, but 450 maybe higher the second). I let the parts cool slowly, so I don’t think that’s the reason. Was the higher temp the reason for the matte finish? Can I put a 3rd coat on? Or, was the glossy finish not what it’s supposed to be and matte is correct? Thanks in advance,


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