By using a little common sense you will be fine. I have some 2 part Matthew's urethane paints I got from my last job. Use a respirator, gloves, booth if you have one, or at least a well ventilated area, leaving the room after finishing painting, you'll be fine. I understand people's apprehension, but its a great way to get a fantastic finish off the gun. I build largely factory stock and don't need a polished finish.