One problem with using the toaster oven for pre-heating is once they are heated up you still have to handle them with forceps or pliers. Don’t drop the jig. And if you are hanging them to heat up - that’s twice you will have to hang them. Not to mention you will be opening and closing the door constantly – turning the oven off and on.
I place a jig in the hemostats and heat it over a heat gun, sprinkle paint on (hardly ever use a fluid bed – almost all my jigs are multi colored), clean the eye of the hook, and then hang in the oven to cure. It’s all about personal preference. I don’t do this for money so I can afford to take my time.