After the second pour was cast and fully cured, I started to detail and assemble the bridge.
![](http://frogangle.com/wp-content/uploads/2018/01/scribing-stone-lines-1st-stageR.jpg)
Adding stone seam lines stage 1
Then enlarging the grooves with a file, and then a steel rod of the right diameter.
![](http://frogangle.com/wp-content/uploads/2018/01/Scribing-stone-lines-2nd-stageR.jpg)
Filing the stone lines
![](http://frogangle.com/wp-content/uploads/2018/01/Scribing-stone-lines-3rd-stageR.jpg)
Steel rod in the 3rd stage of scribing the stone lines
I also filed bevels on the vertical edges of the small arches
![](http://frogangle.com/wp-content/uploads/2018/01/Filing-relief-angle-on-archesR.jpg)
Filing relief angle on small arches
I then painted the inside walls of the bridge with aged concrete
![](http://frogangle.com/wp-content/uploads/2018/01/Assembled-bridge-no-ex-paint.jpg)
Testing assembled bridge ( no exterior paint or weathering)
In a future post I’ll talk about painting, weathering and installing the bridge in the layout