Hi I recently posted about repainting a lot of kitchen cabinets with farrow and ball water based eggshell,which I'm now going to use,but I was wanting to know If I should undercoat them first they have been painted before about 10 years ago and if so do you think I should use the farrow and ball u/c or if I could use dulux acrylic primer/undercoat as it is a bit cheaper many thanks