paint over

Hi all, I have just removed some horrible vinyl wall paper from our dining room and the walls behind have at some point been painted. The paint has flaked in places leaving it marginally uneven - were talking just paint level uneven. Would you just paint directly over, or is there anything...

How do i seal in black mould on wooden door and skirting boards? The wood has a yellow gloss base-paint/undercoat, from i guessing twenty years ago looking at the paint tin[ i inherited the house]. on top of that is 3yo matt white paint. The black mould is under the white paintwork, but not...