/diy/ - Do It Yourself

Here's the story guys

>painting kitchen cabinets and drawers over weekend
>cabinets are some laminate or melamine plastic pink shit
>not very glossy or smooth at all
>sand every surface a once over with 600grit paper
>wipe with warm water to remove dust
>wipe a decent coat of ESP all over
>have used ESP before and paint turned out fine without priming
>wait 2 hours
>no primer
>paint 3 coats of semi gloss on
>it's been 2 days and the paint scratches off easily
>no peeling or cracking
>thinking of spraying a clear gloss coat all over to protect from scratches

Is the scratch problem because the paint has not cured yet, or is it because the paint has bonded poorly to the cabinets?

Due to there being no flaking, I'm hoping I can get away with a protective clear coat and not have to sand back to the plastic and start again.

Thoughts and advice would be appreciated because my missus is really up my ass about this one.