So if you're counting, this is my fourth vanity painting in this house. That's right, we have four bathrooms that all had original 1974 vanities. I've discovered that the easiest/cheapest way to give the entire room an update is to paint the vanity. It really brings it into this century for about $10-$15 and some elbow grease.
I start by taking the doors off and washing everything well. I use my favorite primer, Zinsser Bulls Eye 1-2-3 as a base coat.
After the primer, my sister-in-law and I painted the whole thing white. I just used a Better Homes and Gardens basic white that I had downstairs. I put new hinges and knobs on, and that's it! I just love how much fresher and better it all looks. Now unless I decide to change the colors, all of the bathrooms are "done" for now!