Cabinet painting question

[jolita]

The vanity in our hall bathroom was painted dark brown by the previous owners, and I want to paint it black, but I'm not really sure where to start.  It is a semi gloss now, and H picked up some paint and primer in one in semi gloss, but should I still do a regular primer first??  Or just lightly sand it before painting with the black?  Or is none of that necessary because it has primer in it??  I want to be sure to do it right!  TIA

[tarheels]

I'd sand it very well.

Do you know if they used oil or latex paint? I know oil is banned in some states, but it's really the paint I prefer for painting cabinets and wood, so it's possible they used oil. There's no way to tell that I know of unless they left the can. Latex paint won't stick to oil paint is the reason I ask. Maybe paint a test spot - the latex will adhere, if it's oil, the latex will peel off in strips.

[jolita]

They used Latex- SW All Surface Enamel

[pitterwoo]

I would probably stick with latex then, but I'm with TH, I looove oil paint for furniture and trim.

Yes, sand it. Just so that it's not glossy. That gives your new paint "tooth" to grab onto to last longer.

You don't need to use primer with the 2 in 1, but I can't speak to actual experience. I've used it on walls but not furniture.