Umm, i dont think that will work unless thats what its made for. You have to put the hardener in the resin and that will clog your sprayer when it starts to dry. It will probably even ruin it. Not to mention resin is far thicker then paint, so i dont think this will work unless it made for this.
That's what i was thinking so i will make it just a little runnier than normal but still thicker than paint. Also i plan to spray this all in one go, do a few coats of course, line up the pieces start on one end when i get done start at the beginning leaving very little time to let the resin harden. Also the paint gun is a craftsman so it has a life time warranty if literally anything happens like resin hardening in the gun.