Originally Posted by AnatomicalHeart
I was also curious as if this the of ground needed to be heated on a hot plate or not.
I found that a hot plate was needed when I used that particular hard ground to get an even application. Variations in the thickness that show as streaks aren't necessarily going to cause problems but the more uniform you can get it the better.
If you don't have access to a hot plate an old warming platter from the thrift store works OK. If one of those doesn't get hot enough a pancake griddle or a large electric skillet with the raised lip around the outside removed so it is flat across the entire surface will work extremely well. If you need a larger hot plate you can bolt a sheet of 1/4" thick aluminum plate to the modified griddle. If you need a BIG one then use more than one griddle with an appropriately sized aluminum plate.