Paint Doesn’t Stick to Plastic

You are looking a the plastic escutcheon / decorative cover to hide plumbing pipes under this pedestal sink.
Someone painted it the same color as the wall, and with the same wall paint.

Only problem is, most paints won’t stick to plastic. Plastic is too slick.
That’s why now the paint is peeling off with just the slightest tug or tension. It’s peeling away like a snake shedding his skin.

There are some solutions for this. For starters, the plastic could have been sanded, to give the paint some “tooth” and something to grab ahold of. There are also primers that will adhere to plastic and prepare it to take the paint.
Even simpler, there are paints formulated to stick to plastic. Krylon makes some, and I’ve used it on my outdoor lawn chairs; it’s held up nicely for about 20 years.