Hi Mary, thanks for the comments!
This is the 1/35 kit from Tamiya, it's a really old kit, going back to the 70's...the running gear and the tracks are all one solid piece, and for that, it's quite detailed, the only major pain was cleaning up the seam lines right down the middle of the tracks! :-)
All of my rubble as always, tends to look the same, but for me it works.
I have a list of "ingredients" that I use for my rubble:
-Smashed plaster (poured into sheets, and tinted with brick coloured acryllic paint, then put into ziploc bags)
-Brick coloured gravel, purchased at Michaels Craft Store, it's from the xmas Village Collection
-Fine and Coarse Rail ballast
-Bits of broken flat toothpicks (I prepaint several hundred different colours and break them all apart, and bag 'em for later)
-Bits of bigger pieces of square balsa wood (for beams)
-Bricks (either hand made or purchased)
-Any other odds & ends, depending on the situation eg: shingles, etc
Now all I do is just add a little bit of each into a jar, shake it all up, and pour my rubble onto my base, adding stuff like jerry cans, crates, bigger beams, etc. Once I have it the way I like, I mist with water, to wet it, then start adding my white glue/water mix everywhere to glue it down. This usually takes a few applications. While still wet, I'll add the really fine sand ballast for that gravelly rubble look. Once everything has dried, I add a wash of burnt umber/black artist oils, followed by some drybrushing and a topcoat of MIG Pigments Brick Dust.