Plastic cements will not work at all (solvent types) or very poorly (tube types) on resin parts. Use CA type glues or epoxy as mentioned above. Be sure to wash the parts, as some casters use mold release that will cause poor paint adhesion. Auto Body putties stick well to resin if you need to fill a gap. Cut off as much excess casting sprue with a saw (if there is an excess). Wet sanding will keep the dust down and make the cats happier - or at least as happy as cats get. Resin is very soft and can be sanded or cut very quickly and with little effort.
If the part is to be attached to a plastic model, it never hurts to pin it with brass rod instead of relying solely on the holdin power of the glue.
Prime the parts with a quality primer, such as Floquil, then overcoat with the paint system of your choice.
Have fun!
Kurt