Painting my kitchen cupboards

I haven’t done this myself, although I think preparation of the surfaces will be the key and some sort of sealant afterwards.
However, on a recent TV programme, someone had their kitchen units professionally spray painted. It said that a new kitchen would have been £20K, but the spraying had cost £3500.

I did. When I first moved in here the cupboards were drab and dreary but I couldn't afford new ones. So I simply bought gloss house paint, a pale turquoise and white, and did them all myself.
That was 15 years ago and it needs doing again now. But it's lasted well and has been easy to wipe over.

Oh dear. I touched something before I finished!
Stand up to being cleaned constantly