> The other bad thing about 3d printing is layer lines. I had some bench parts printed, and I thought I could cover up the layer lines with acrylic paint, but i

> The other bad thing about 3d printing is layer lines. I had some bench parts printed, and I thought I could cover up the layer lines with acrylic paint, but it it turned out that even two layers of gesso followed by two layers of paint didn’t solve the problem. You can fix that problem by sanding your 3d-printed object before applying acrylic paint. It's also recommended to apply a primer before you paint it.