I tried that, but I wasn't smart enough to take the toaster oven out of the kitchen!!
I can't remember the temp I used, but it did cure the paint really nicely!
Paint takes a long time to dry thoroughly. If it isn't completely dry it will scratch off very easily. After baking it for an hour the paint was pretty hard. It looked like it was done by someone who knew what they were doing!
I recommend trying it, but take the toaster oven outside