Post-apocalyptic bunkers must have some pipes and other strange bits. But the core is a well-thought cardboard structure
1. Create a base of the right size. Be sure to check our guide how to make terrain bases
2. Following our bunker template/plans PDF draw the walls, the roof and the battlement on a piece of cardboard
3. Cut out all the elements and glue them together using PVA glue
4. Hide corrugation in the cardboard using some painting tape
5. Dig your bits box to find some decoration and bits that may pass as doors or firing points
If you can't find appropiate bits you can always use thin cardboard to make doors and windows. Fortunately for us in the 40th millennium the doors can be perfectly flat without any knobs or whatnot as they are controlled by panels and DNA scanners.
My bunkers' elements come mainly from Games Workshop's Rhino kit. I put three firing points on each side of them.
6. To strengthen the pseudo-industrial look I added a pipe made of a drinking straw and a container full of strange liquid made of a bottom of a plastic soda bottle and a round piece of cardboard forming the liquid surface
To make the straw stick to the building I glued a piece of plastic miniature sprue inside one of its ends and hid the mounting under a round, metal washer.
7. Painting the bunker is very easy. Just cover them with dark grey and then drybrush with light grey
8. "Metal" elements are best painted with enamel paints as acrylic ones don't have the right shine and texture on larger surfaces. I use Revell enamel "steel" paint number 32191
9. The mysterious fluid is a photography cut out and glued inside
10. For the final touch I printed and glued some propaganda posters and signs. "Mutarium Xen.B.Mass" means roughly "Xeno-biomass Processing Plant" in Latin