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My decking is painted but in a lot of places the paint is peeling off to the colour underneath, my question is do I need to sand the old paint off or can I just paint over it. Any suggestions as to what paint that I need to purchase Any suggestions would be appreciated.

thank you

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You definitely need to sand the loose paint off before repainting. Otherwise your new coat will quickly begin peeling as well, since it would be relying on the already peeling paint underneath it for adhesion to the deck.

There are actually disc sanders made specifically for the purpose of removing old flaking paint. Sanding will also help feather the edges of spots where the existing paint has already chipped off. That way you won't get the flaky texture showing through on your new coat.

Prime any areas with bare wood showing, and repaint with an outdoor paint meant for porch/patio/deck floors.

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