Is this normal...painting wardrobe doors....advice needed please

[dazzystar]

Hi All,

Four coats of undercoat so far using Leyland white primer and undercoat and a Two Fussy Blokes mini roller sleeves and I can still see the previously painted black wood surface a little. Is this normal? Do I now call it a day and start painting with the top coat (Leyland Multi Surface satin)?

Here's a pic of the wardrobe doors...

Cheers
Daz