One of those great ideas that never was is the mole machine — a transport with a giant drill on the front that carries troops under enemy lines.
Here are some instructions for building one for your 28mm troops.
Modeling
Sculpting A Knight Tutorial
I think that everyone who has ever played with miniatures has thought of sculpting one. Here’s a nice tutorial on sculpting a knight.
Constructing An Egyptian Tomb
Matakishi’s Tea House has a photo tutorial on making a modular Egyptian tomb from painted balsa blocks. The effect is quite nice and the end result would work very well in ancient, as well as pulp miniatures games.
Making a 28mm Scale Church
TerraGenesis has a photo tutorial on making a 28mm Scale Church. It’s done in a cross layout and features a nicely done interior.