I've had the four main types of Vallejo Pumice sitting in my cupboard for ages, so thought I would finally get around to doing a quick comparison/review of them.
For starters here is what they look like:
You basically spread them onto a base with a spatchula and leave to dry. Drying time is 3-6+ hours depending on the temperature.
They go on wet:
But dry out and change shape:
To provide a more equal comparison, I've sprayed them black, then drybrushed with adeptus battlegrey, codex grey and fortress grey:
Check out the full article as there are some close up pictures of the bases as well as a couple of good pointers and tips. You can order this stuff from The War Store and it isn't that expensive. I just might have to order some and give it a go.