A grill like u cook pancakes on is better than a toaster oven. They are temp control you can lay your injectors on it to keep them warm also if u use glass measure cups to heat your plastic u can set them on it while u shoot. It will help it from cooling so fast. I don't heat molds as it takes too long too cool before taking your plastic out. Unless your mold has problems u should not have to heat them. U can find them for around 25 bucks or less. If u paint jigs a toaster oven works great for cooking your powder paint. My wife bought the one i use for 5 bucks at a thrift store! U might find a grille there also. Cub