What brand / line of paint should I use? I want a semi-gloss finish, not super high gloss. I'd like to keep the black color. If it makes a difference, the door doesn't get much direct sunlight or rain. I'm in north Texas, so we get lots of heat and humidity in the summers and at least a few weeks of freezing in the winter.

I'm happy to sand, prime, etc. I'm a DIYer but fairly experienced (eg lots of cabinets, some furniture, many rooms). I'm just a little stumped as to what kind of paint since I've never painted any exterior surface like a door (ie higher than normal gloss).

Thanks in advance for any help!

You can use an oil base primer and then latex paint on top

OR

Oil based paint straight on top of current paint

They suggested an EXTERIOR paint for the door. The door does get hot and cold, etc. Just get a quart made up at Benjamin Moore. How about "Texas Leather" instead of black? It's a gorgeous dark, rich, velvety dark brown. Check it out on their personal color viewer online.

I'd LOVE to change the color but we just had shutters in the front painted black. My DH had said he wanted a new door, so I told the painters to skip the door. Then after all the painters left, DH decided he didn't want a new door. So I'm painting it. :) That color would look great with the brick on the house, so I'll save the idea for next time.