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I need to figure out the best way to paint an exterior mural on Mapes Corelite Spandrel Paneling. I'm thinking, scuff with 180 grit sandpaper, bonding primer, exterior house paint and primer in one, then followed by a powder clear coat. Can anyone confim this or suggest something better? Thanks
 

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I need to figure out the best way to paint an exterior mural on Mapes Corelite Spandrel Paneling. I'm thinking, scuff with 180 grit sandpaper, bonding primer, exterior house paint and primer in one, then followed by a powder clear coat. Can anyone confim this or suggest something better? Thanks

a good exterior acrylic paint does not need a clear coat.
 

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However you can add it to achieve better exterior durability and abrasion resistance.... Which is not a bad idea because you said it is a mural.
 
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