I used to think that all wax was the same. Did you know that Forbes Wax is water based and Mobil Wax is oil based? Both waxes can be thinned with water...the Mobil Wax will need to be stirred frequently.
I use the smooth, easily to apply Forbes Wax for the bottom of bisque ware. I also use one cup of Forbes with one teaspoon of alumina hydroxide ( stir together and keep in a baby food jar) for rims of teapots and the channel on the lid that touches the rim. You can easily tap the lid with a wooden spoon after firing and it will release. If there is any white residue, simply use sandpaper to remove.
Mobil Wax is excellent for wax resist over a "dusty" glaze. If you wax resist with Forbes , it will pop off. The oil in the Mobil Wax allows it to adhere. Mobile Wax has more drying time than Forbes. I allow it to dry over night before dipping or glazing.
* do not allow wax to freeze....might as well buy new wax.
* put a few drops of food coloring in the wax...the color burns off during firing.
You can purchase these waxes at Highwater Clay, Asheville, NC