My son and I just used Sculptamold for the first time with his dinorama. The stuff dries hard within about 30 min or so. So as it sets up We pressed a set of tracks into it, some molding did stick to the tracks but washed off easyly. If we had waited for just a couple mins longer it would have been perfect. The Dinoramas track marks showed up great.
BTW the Sculptamold worked out great for our snow in the dinorama also.