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Painting Q&A: Painting Sheet Metal with Holes

Q: Do I have any shot at painting without these holes getting plugged with paint? Is there a rule of thumb for minimum paintable hole size?

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Q: I have a design for a sheet metal part with a very fine perforated hole pattern. Hole diameters range from 0.41mm to 0.91mm. Hole spacing as tight as .90mm center to center. The finish specified is a metallic paint. Do I have any shot at painting without these holes getting plugged with paint? Is there a rule of thumb for minimum paintable hole size?

 

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