That's a good idea. I found this that I think I'll try next:
Modern Masters DP609 Clear Decorative Painter’s Acrylic Dead Flat Varnish
I am hoping that the "Dead Flat" is accurate.
I am painting sandstone cliffs on my layout. I've just used standard acrylic paint but the result is too shiny when the light hits it. I have tried Testor's Dullcoat and it looks the same as before I started.
The top part of each cliff was carved out of Foam Scultpture block, which has a...