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Painting MDF

Discussion in 'Decorating and Painting' started by nabby68, 4 Sep 2018.

  1. nabby68

    nabby68

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    *** Please note that the title of the post is MDF but I’ve decided to use plywood instead


    I plan to box in some ch pipes in the hallway ,that run ceiling to floor, using 12mm ply I would like to blend the boxing in with the wall which I have just emulsioned grey. Do I need to prime the Ply before applying the emulsion?
    Many Thanks
     
    Last edited: 5 Sep 2018
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  3. endecotp

    endecotp

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  4. nabby68

    nabby68

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    Prime with what exactly? Or can I use undercoat?
     
  5. endecotp

    endecotp

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    Prime with primer. Or combined primer/undercoat.
     
  6. nabby68

    nabby68

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    Pva any good?
     
  7. JohnD

    JohnD

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    Please don't put glue on any surface that you hope one day to paint.

    Some plasterers used to do it, but most of them have been killed by angry decorators.
     
  8. nabby68

    nabby68

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    Thanks John D good advice.
    What would be your advice as to what to prime it with?
     
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  10. JohnD

    JohnD

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    White acrylic primer-undercoat is OK on indoor wood. It's quick drying and you can do several coats in a day. But ply tends to be rather grainy so you might want to smooth it off.

    For durable outdoor work I think you can't beat Aluminium Wood Primer (oil-based)
     
  11. nabby68

    nabby68

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    I have a Dulux water based undercoat and also a Dulux Trade solvent based undercoat. Are any of these suitable?
     
  12. endecotp

    endecotp

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    Those are undercoats. Clue is in the name. You want a primer, or a combined primer/undercoat, like I wrote in my previous message. Not PVA, not undercoat. Primer.
     
  13. opps

    opps

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    Sorry, have been busy.

    Your waterbased undercoat is an undercoat/primer. You could use that and then apply the oil based version over the top if you wanted.

    I don't know which quality of plywood you have used. If the rest of the hallway currently has lining paper, you could use lining paper over the plywood and then use emulsion over it if you want it to "blend" in.
     
  14. nabby68

    nabby68

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    Thanks opps. Excellent advice as always
     
  15. opps

    opps

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    You are welcome, and thanks for the thanks.
     
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