Yes, if you go by the old school method of 300 degrees; no, if you go with the sheet with hotter individual temps listed. Dragonfly (one of my favorite colors) is listed for 395 to cure, but 350 will melt the paint to where it will run and close the eyes on smaller bass jigs. In my mind, melting the paint is a smidge too hot.
Also, if you use a toaster oven, be aware of which elements are in use... if you get too much heat hitting the weed guards, they will start to curl, especially the finer ones. 350 away from the elements doesn't seem to affect the weed guards, but the paint runs at that temp... so again, I go with 300.