I've sanded down an internal door and in a few places it's gone down to the bare wood. Do I need to prime these patches of bare wood before painting the door or can I just put on two or three coats of the water-based Dulux QuickDry Satinwood pure brilliant white which I'm using, and which the tin says is self-undercoating?
If I do need to prime the bare wood bits is it better to use a water-based primer or a solvent-based one?
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