DIY Table Refinish

So, over a year ago I ordered a coffee table and two side tables. Well they were the wrong color. SO Wrong. I got busy and just forgot to exchange them (since it was the fault of the store).   My handyman grandpa came to town recently and I decided it would be the perfect time to refinish my tables.
(*You can't tell in the picture, but the "before" was actually a lot lighter in person. The "After" is black*)

What I used:

• power Sander (I think that's what it's called.:)
• Black Satin Spray Paint

It was so easy, so this is going to be a super short blog. 

First, I sanded the tables down.  They already had a shine finish and I wanted the paint to hold better, so I just sanded them. *Be careful to not round of the edges with the sandpaper*

Then add a layer of spray paint... let it dry... spray again... let it dry. 

I'm thinking about adding a clear coat, but I'm not sure. Any thoughts?