Above is a picture of kitchen units before Simon painted them up for a commission kitchen he did last year.......this is exactly why you should assess each individual project before you decide to start painting!
At first look these units didn't look dirty or coated but with closer inspection he discovered a really thick layer of wax where the units had been over waxed by the previous owners of the house layering up each time (less is definitely more when it comes to wax). If he had just painted straight on top of this, the paint wouldn't have gone on well at all and would be sitting on top of the wax instead of to the furniture, resulting in a patchy uneven and quite frankly awful looking kitchen.
To prevent this from happening always clean kitchens with sugar soap to get the grease off and check for waxed layers if painting old wooden kitchens. If you have layers of wax the only way to make the finish of the kitchen beautiful, is to scrape it all away i'm afraid. (this should only really apply to kitchen units and not general household furniture that's not greasy etc).
Once you've done that you can paint away with any of the 36 Annie Sloan colours of your choice then soft wax to seal....... Remember we are stockists ;-)
If the idea of this terrifies you, please pop in for advice, a one to one course or we can simply do it for you.
Here's the finished product: