Ironhands has a page with tips for creating sufficiently alien Eldar terrain for your Warhammer 40K games.
modeling
Wrecked Cars In Plaster
Given all of the Zombie gaming going on these days, there’s bound to be a demand for models of wrecked cars. Terragenesis has an article on making casts of car wreckage in plaster.
Making Silicon Molds
At A Year of Frugal Gaming Blog, the author has an illustrated article on his efforts to create a silicon mold to allow him to replicate various architectural parts for terrain making.
Making An Urban Streets Gaming Mat
With all of the zombie games people are running these days, there’s got to be a big demand for a gaming mat marked with an urban streets grid. Skankgames has the solution.