Terrain for the lazy (and cheap) wargamer

Thinking about terrain for my large-hex game mat, I was wandering around the hardware store downtown when I came across this package of extra coarse sanding discs.  Instead of attempting to sculpt and then paint craters like I've seen others do, and because I don't want to put forth the cash for manufactured scenery, I decided to see how these will look on the playing surface.

Likewise, instead of sawing and painting strips of balsa to represent a network of roads, I could just cut up this wet/dry sandpaper to use as sections of pavement.  Here it is front and back:

Here's the crater for giant games of Ogre laid out on the game mat with four-inch hexes.  Not bad, and I'm fine with using the five-inch circle to represent the hole dug by a cruise missile during the game.  I don't have to worry about it overlapping other terrain, since it turns towns and forest up to three hexes away into rubble.

And the roads look decent as well on the Corsec mat, although I'll need to use sticky tac or something else to keep them in place during game play.  I still need to work on getting the angles correct, but the straight-line sections of highway look fine.

So, I have roads, craters, town hexes and forest hexes for my massive Ogre games.  Now to figure out rivers and swamps ....