HI as we make it I might be able to help here :)
So you have found one of the biggest advantages of the system !! you can remove it WITHOUT wrecking the model. now IF you had do it with a filler ? :( :)
1st you must clean the modes surface with detergent or use a fiberglass scratch pen , this to stop the liquid from puddeling , which is what you are getting where it builds up to thick.
2nd It helps to make a slurry from the pink Setting-Sol and the powder, Paint that on BUT keep it wet so it flows with a little vibration at the brush tip IT WILL self level !....Like concrete or wet sand at the beach. This can be very thin or thick ...as you wish. You can re-wet this surface after 2 hours with the Setting-Sol neat, this can then be dusted if you wish for the really rough surface (or as concrete walls for example)
You can then build up over that when it is dry (2 hours depending on temp) and dust some more down on it for a VERY rough surface, Great for mixed textures al is often found on Russian turrets,
I use it ONLY as a slurry now for cast surfaces. Normally in one thin and then one thick slurry application.
IF you dust it (AND for Anti-Slip)
Always apply the powder with the model at an angle (about 65/45deg) so the powder flows/falls over the surface rather than biulds up (which is NOT what you want :) as you are finding.
This has had a dark wash applied so you can see better BTW
[img.nr] http://smallshopeu.com/KVII%20%201940%20pics/Untitled-13.jpg[/img.nr]
from here
http://smallshopeu.com/photo__T_44.htm
Any more help just ask away
Alasdair