You don’t have to use specialty waxes to seal chalk paint.

krylonUsing the specialty waxes can be expensive, time consuming, and some serious elbow grease.  Krylon makes a product called Matte Satin Finish, which gives you the same dead flat finish that the waxes have.  I do recommend sealing your piece with Minwax Poly Acrylic before applying the Matte Finish.  The Poly Acrylic will have a slight sheen to it, even in the satin finish.  You can achieve that dead flat finish by spraying your piece with the Krylon Matte Finish.  I have provided an Amazon link for you to make a purchase.  Happy Painting! PF4rndblue