hi grendels. i use tamiya putty sometimes. i use it if i have time to kill because it take hours before you can attempt to sand it. but its not cakey like squadron. though squadron has its good points like fast dry time (AS YOU KNOW!). But tamiya's is more fluid going on and sands well. it does suffer from a little shrinkage. I used it on my SS Tie Fighter build and it cleaned up that resin well as their was a seam i had to fill on 4 sides. It's good for resin as its much stronger than the squadron.