I experimented with brush on lacquer over painted letters. When you put lacquer over the paint pens you buy at the craft store (acrylic paint pen) than now I am reading "water resistant". The lacquer smears the paint on the first pass. And this is having the paint sit on my practice board for over a week. Then I put the lacquer over the acrylic paint that you buy in the craft store. No problems with smearing at all. I even tried to smear it on purpose with aggressive brushing over the same spot. Just thought I would share. I am so glad I did a practice piece because I was going to do my lettering with the paint pens like I normally do but thought I would experiment before I committed since I am using the brush on lacquer more and more.