No matter if you’re painting new woodwork or repainting older woodwork, you’ll get much better results if you prepare your surfaces properly first. After you’ve watched this video, you’ll know how to fill different size cracks and holes for a smooth finish. You’ll understand how to turn a surface that’s already been painted into a ‘key’ (a key is a surface which allows paint to bind properly). For new or unpainted woodwork, you’ll find out how to prevent discolouration by using knotting solution. The instructions given in the video apply to interior doors, window frames, architraves and skirting boards.

Preparation & planning

Before you start prepping the woodwork, make sure it’s clean and dry. If possible, remove all furniture from the room or move it into the middle and cover with a protective sheet. You should also cover your floors as dust created from sanding, splashes of filler or knotting solution could cause damage.


After preparing your woodwork, you're now ready to paint! See our video 'How to paint interior woodwork' for further guidance on painting doors, wooden window frames, architrave and skiritng.

Hints & tips

Adding as much filler as you can into any holes and cracks will help you achieve a smooth finish.

Always sand off excess filler in the direction of the grain. Once you’ve finished sanding, brush the dust off the wood then vacuum thoroughly. If dust gets caught in the new paint, you’ll end up with a grainy finish.


When sanding, it’s important to wear a dust mask and make sure the room is well ventilated.

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