Im impressed with the Liquid Nails for Projects and its ability to not come up easily. The foam is securely in place to my shelf's and cannot be moved at all. I used the stuff to glue the WS Foam Roadbed down as well. This holds nicely too. I did however glue some down with the Liquid Nails stuff and discovered it was in the wrong place a few days after i had done so, I was able to pull the roadbed up and get it all off INTACT with no damage done to the roadbed. I was amazed, i thoght forsure that that part of the roadbed was done for and trash, but i was wrong, and the Liquid Nails was still on the foam base. I tryed to peal it up, and to my suprise it came up quite easily and nicely. It does take some effort to pull the adhesive off the foam, but its durrable, yet if you make a mistake and glue something down in the wrong spot with it, its not like you cant un-do it with some effort and salvage whatever it was.
All around, i love Liquid Nails for Projects, and at a little over a $1.50 a tube, its well worth it.
I use WS Foam Track Glue to glue down my track to the roadbed and use the WS Foam Track Pins to hold the track in place while the stuff dries, usually only takes between 30 mins and an hour. Once that stuff dries, it not easy to get up and holds really well.