How-To Videos

How to Fill Grooves in Paneling Before Painting

By: Danny Lipford
Smoothing out joint compound in paneling grooves with a drywall knife.

Filling the grooves in paneling before painting for a smooth surface.

To fill the grooves and paint paneling:

  1. Sand the paneling lightly to dull the gloss.
  2. Wipe any sanding dust off with a damp cloth.
  3. Fill the grooves in the paneling grooves with joint compound.
  4. Allow the joint compound to dry.
  5. Apply additional coats of joint compound, if needed.
  6. Sand the paneling with 100-grit sandpaper until the joint compound is smooth and flush with the paneling.
  7. Wipe any sanding dust off with a damp cloth.
  8. Prime the paneling with a shellac-based stain blocking primer.
  9. Apply two coats of wall paint, using a 3/4″ nap roller to add texture.

Watch this video to find out more.

Further Information

Print   Video Transcript

Danny Lipford: First of all, use a little drywall mud, this is the same joint compound that they use to finish drywall. And an old drywall guy showed me a pretty cool trick here.

If you want to speed up the drying process, then put regular joint compound there. Then you can use this, which we call fast mud or twenty minute mud. Just mix a little in there. The fast mud is a little hard to sand sometimes, but if you mix just a little bit in with it, it’ll speed it up. But you still can sand the surface smooth later on. Sometimes you have to add just a little bit of water to it depending. But this looks like it’s shaping up pretty good.

All right, after you mix it up well, then basically what you want to do is to fill the grooves in. You don’t want to put too much on the surface of the paneling, you just want to fill those grooves up so that it’ll dry. Sand it a little bit, then it’ll be time for the primer.

Boy, we were really lucky here in that the grooves in the paneling were not very deep, so one coat of joint compound, nice and smooth. But if you have deeper grooves in your paneling, you’ll need at least two coats to really surface it out well.

But then, after everything is nice and dry, time to grab the sanding pole again. Just really sand everything, really pay attention to all of the sanding, you can see how well it comes off. And you really don’t have to sand all of the excess drywall off. You just want to get everything nice and smooth.

Then another wipe down with a damp rag before we prime.


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3 Comments on “How to Fill Grooves in Paneling Before Painting”

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  • Charles Popelka Says:
    January 1st, 2017 at 1:39 pm

    I have the same question as Karen, but I don’t see any answer. “Since MH walls are meant to flex with the shifting that occurs over time, will there be a problem with the compound falling out of the grooves?”

  • Josh Gullett Says:
    August 25th, 2015 at 12:48 pm

    I want to replace my countertops in my kitchen, however I don’t have the money to do so. Do you think this process will work for filling in the grout gaps between the tile on my countertops? Then I can pour cement on top.

  • Karen Says:
    August 17th, 2013 at 12:01 pm

    I am wanting to achieve a similar finish to walls in my newly purchased Mobile Home. Since MH walls are ment to flex with the shifting that occurs over time, will there be a problem with the compound falling out of the grooves?

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How to Fill Grooves in Paneling Before Painting