I've used Nurgles rot for basing and it's come out quite well
A few things I will mention:
-It will take quite a lot to build up a layer so no really suitable for large bases
-it's quite opaque so no good if you want it more watery, though great if you want a slime look
-it's not too glossy so you might want to give it a gloss varnish after
-be careful to make sure it goes on smooth
Typhus corrosion isn't really the same, it's more like a brown wash with little particles in it which make the surface rough and feel corroded