Hi Julie,
If you pop down to your local paint store or Focus/B&Q etc, get yourself at tin of MSP (multi surface preparation). It is a thin liquid with a consistency of water that you wipe over the surface to be painted, after five minutes wipe off the surplus and you can paint your cupboards after 90 minutes.
Its marvelous stuff it leaves a deposit that really makes paint stick .
It works on glass, plastic and your laminates. Costs about £8-50 for a tin which will do your caravan and half your home.
Cledlyn
August 2008