If you want to separate it you could build separation funnel like this http://highschoolchemistryguide.com/...-apparatus.png
they way I would go around to building my own would be using a soda bottle cut of the bottom and attach a small diameter rubber hose to the top and putt a clamp on the hose.
Simply pour in the water/resin mixture hold the funnel over a tank for the salt water remove the clamp and use your fingers to control the pressure on the hose and thereby the speed of witch the bottle empties, once the resin just passes the pressure point you squeeze the hose to prevent further outflow move the funnel over container for spent resin and release the pressure