Coloring and smoothing coating: Except for penetrating porous components, you can just use epoxy to provide a 3D model color or simply a smoother end. If it doesn’t seal the substrate, the next coatings will outgas leaving bubbles or voids. Squeegee and back again-rolling is the preferred approach. Squeegee application https://www.propanraya.com/id/produk/epoxy-fast-dry