The reccomendation seems to be that no base coat is needed, but I went ahead and did a coat of gelous before applying the polish and I followed with three coats of Matte Vinyl. This is in the shade.
This one I added just for fun and this not the actual color of the polish. I just thought it looked pretty darn cool in this lighting.
This is not a polish that can only be worn for Halloween or in October, but it is a great choice. It sort of has that spooky look to it, and you could always mattify any regular black polish if you don't have a matte black polish.