Thanks for the comments guys.
Update
Fixed the sagging track that Gary pointed out. I had to take out a link and connector. Not a lot of fun.
Started work on the base. I cut of MDF for the base and gave it a coat of urethane. One thing I like about MDF is that it never warps. The coat of urethane was used as a precaution. I used Sculpt-a-mold for the ground work, sprinkled on some very fine sand and pressed in old Sherman tracks while it was still wet. The scene represents the area just over the berm, hence the reason why it’s flat.

I’ve been told that the “sand” on Iwo Jima was black, due to it’s volcanic nature. However, in pictures that I’ve seen of the eastern invasion beaches on Iwo Jima and satellite shots from Google Earth, the sand was more of a grey, and sometimes brown, rather than black. With that in mind, I gave the base a coat of Tamiya German Grey, XF-63

Next, I “highlited” a couple of areas with a thinned down mixture of Tamiya Red Brown and German Grey

Then, I applied some soot black, panzer grey and earth pigments to the indented track areas. Trying to show a little depth.

Lastly, here is my overall scene just to show placement. I’m working on crew figures and a jeep driver, as well stowage for the LVT and some medical supplies and stretchers for the jeep.

All comments are graciously welcome.