Creating vertical cliff face

That sounds reasonable.  And how about making a baseboard at the bottom, as that area will surely taken a beating?

There's a thread running currently by J Daddy on the main forum:

 

Layout edges

 

Jim

The plaster cloth works well, I've done.  Sculptamold is very messy used vertically.  Put Saran Wrap or something if there's track below.  I didn't because I was in too big of a hurry and am still cleaning track. 
A WS type plaster cloth is available at Hobby Lobby or Michael's, use their 40% off coupons, about half what you pay at LHS.

here is one that is a bit less messy on existing area..Used cardboard,but MDF works

 

before

 

hour later

 

 

done with fusionfiber

If Sculptamold is messy when used on a vertical surface,does anyone have a suggestion as to what covering material would be best to create a rock cliff for the attached?

 

I am new to the hobby and I am building a permanent Christmas layout.  The tunnel structure shown in the photo below is made of foam covered with crumpled aluminum foil then covered with plaster cloth (from Michael's).

 

I also have a few Woodland Scenics rock molds available and would like to build a rock cliff that I could add fake snow to on the horizontal ledges.

 

Thanks for any tips that you can share.

 

One trick is to stack and hot-glue very shallow strips of broken ceiling tiles:

 

 

Since I really could not try the broken ceiling tile application due to the work already completed, I decided to add a few hydrocal lite rock castings over the plaster cloth and then add my first attempt at using sculptamold.

 

I have to thank the forum contributors that previously posted comments regarding this product as it is totally amazing and very easy to work with.  It was a bit difficult to find and I ended up buying a three pound bag from amazon.com to get started.

 

For my first venture into creating scenery, I am very pleased and I cannot wait for the sculptamold to dry so that I can begin painting the rocks and cliff.

 

This forum is a wonderful source for information and I appreciate everyone's help.

 

Updated (unpainted) photos attached...