The materials I have have had printed so far have been similar to a hard resin, but quite brittle. Some sanding is required to smooth out the layer lines from printing. I have used ACC and epoxy for assembly. Paint can be lacquer, enamel or acrylic (the parts can be cleaned in Acetone). Currently I think the most cost-effective use for these parts in our hobby is for making masters for casting, but I used the printed parts directly for this 1/24th scale lubester. (the tie rods are brass wire, some things just can't be printed yet).