All finished with your product or wanting to seal it before glazing etc?  Modern Clear Coat is your answer!  
While Modern Trends Mineral Paint is self-sealing, it is recommended that you use an additional top coat if the piece will be well used like a side table, nightstand, etc.  I even use the Matte one for my decoupage medium!
This water based poly is easy to apply and will give your finish a nail hard finish that will last for many years.
Comes in Matte or Satin