I have found , when using a short drying time you get more of an effect , than when leaving for a long period of time. It all depends on what sort of finish you want. I stipple on different shades of rust colour underneath. I then use the worn effects for small areas and the chipping effects for larger area. Anyone new to this , it's just like the hairspray method but you have alot more control.
I have been using the stuff for about 2 years .
Also reference prices any of the AK paints or Vallejo are a damn site cheaper direct from Spain .
Hope this helps