Chalk Board Paint

Image from Graphics Fairy.

 I went looking for some chalkboard paint on-line. 

There is a wide variety available. 

Including wallies, contact paper and varieties of craft, spray and other paint. 

What works?  What do you use?  Keep in mind I am not such a neatnick painter and brushstrokes can be the bane of my existence.  Any advice will be greatly appreciated.