Hello, I am new to this forum. I have an n-scale layout that is 12' x 11'. There is a double main line each main line has about 84' of track. I have been working on it with my 2 sons for about 2 months now on scenery. In the past my layouts did not have scenery on them. I desided to put scenery or try scenery on this layout. We started with a mountian and tunnels made from ceiling tiles and newspaper covered with paper towels soaked in watered down paster. We are trying to finish the first part of the layout 2 more sections left to work on. Nothing is painted right now. I went down to the hobby shop to get advice on how to paint the mountain. If I followed their advice I would have to go get a loan from the bank. I do not have modeling equipment like air brushes, compressors, regulators, I have a utility knife and paint brushes. They told me that I needed the air brush set to paint the mountain. I went down there hoping to get paints to complete the first section of my layout, but ended up coming home empty handed and discouraged. I need help with what kind of paint to use, what colors to mix to get a redish gray rock that are found in the western USA, my layout is going to have snow on it but some of the rocks are vertical and would not have snow on them. There is a river bed that needs to be painted. Here are some pictures of the mountain and the river bed. I could not get it in one picture it is too large the first section is 4'x12'. Thanks for any help or information that you can give me.