It looks fine the way it is. Cover any crack neatly with clear tape, set it up to fly and fly it. if it survives, you have a vintage EZ that everyone recognizes and knows what it is. If you paint it and make it look like something else, it will take away from the EZ vintage model that it so very much looks like now. All EZ's are heavy and fragile, the older the more so.
Here is what happened to my Dallas Doll. Little bit aft CG, no forgiveness.
Chris...