I tried using Mold a Scene Plaster to help fill in and smooth out some bumpy spots after using cardboard strips and plaster cloth.
When I mixed it up according to the directions on the box, it came out like wet coarse sand. It cant be spread smoothly. It's clumpy and falls apart. Am I doing this wrong or is this just a bad product to use to fill in and smooth the area on my mountain?

Has anybody used this? or do you guys recommend I use something else?

I was wondering if the ez track is compatible with a Span arch bridge ( by Life like ) I dont want to order the bridge only to find out the ez track is to wide or too big. Any thoughts?