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I'm beginning to think layout this mid August.  I'm posing the question about tunnel interiors.  How important has it been for your tunnels to have special design, such as rock walls, or concrete smooth walls?

I've spray painted the interior that is already in place. Now I'm ready to put in place more wood deck and Styrofoam walls to create the train tunnel scene.

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My personal preference is for the interiors to be finished to the distance you can see into the tunnel.   You can even add humorous scenes in little nooks and crannies inside.   Since most tunnels are made of foam what I've always done is to lay down the foam on a gravel lot or driveway and stand on it and rock back and forth - the indentations made look like natural rock when paint is added.   My friend and fellow forumite Owen Sturm, who departed this life far too early,  suggested this to me years ago and it works great. 

-Greg

ScottM posted:

I use black foam core for 12-24 inches (sides & roof), and then rock castings made with Brandon's  cast satin to wrap around the sides and roof for first 8 inches into the entrance.  My goal is to avoid seeing layout structure when casually looking into the tunnel.  Looks very real.

Sorry but I must ask, what is Brandon's cast satin, used to wrap side and ceiling of tunnel. I'm interested Scott!

a description of Brandons and where to obtain?

 

Thanks ,  John d.

Sorry for the slow response,  I did mean Bragdon Enterprises and never realized the typo until now.

Bragdon carries a number of rock molds. For the tunnel interiors,  I select molds without a lot of heavy features in order to avoid interference with engines and rolling stock. 

The use of cast satin along with his molds allows the rock shape to be pressed/formed into place before it hardens.

The rocks are then painted with artist gesso followed by tempera powder. Bragdon provides a more thorough description on his website.

Scott 

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