It seems like you need a set of tongs for holding the piece your working on. If you can't get one soon, then you could file off the teeth of your vise grips so they don't leave marks. Good luck. Also, with a gas forge, it is more difficult to burn up the material you are heating. Gas forges may not get as hot as coal, but that depends on the size of the box and number of burners. With a one burner forge, you can heat 3/4" to 1" material up to an orange heat without trouble, but it is more difficult to get to a yellow heat. I find myself returning my material back to the gas forge many more times than a coal forge. It is very much a timing thing for each type of forge. Good luck.