Pink foam?

What is this stuff I keep reading about and where can I get it? It seems as though you press designs into it and that it's very workable. right now I'm using foam board, bamboo skewers, cardboard and popsicle sticks.

Pink/Blue Foam is Extruded Styrofom Insulation. You can get it at Home Depot, Lowe's, or some Lumberyards. Real people, that is General Contractors & such, DO NOT refer to it as Pink Foam; ask for Corning Insulation Foam Boards. I hope that isn't too confusing & proves of some help.

that's perfect. I'll try to get some this week and get to work on some REAL buildings

I see it at 1/2 inch and 3/4 inch thickness. Is this right?

There are various thickness, ranging iirc from 1/2" to 2".

If this is the first time you'll buy it, I'll recommend 1" thick, as that can be used too to make hills and rocks for WHFB, 40K, or any similar system.

But of course, all depends in your personal tastes, and the use you plan to give the material.

Hope that helps.

Well, the only bad thing is that it's either 1/2 inch, or 3/4 inch thickness. Those are my two options. How hard/easy is it to glue two pieces together to make the pieces thicker? Such as gluing 1/2 and 1/2 inch pieces to create a 1" thick piece of foam?

Not that difficult at all.

You'll need a glue that don't melt the material (you already know most spray paints and contact glues melted foamboard, don't you?) such as good old white glue and some straight cocktail sticks or pins and that's all.

Spread the glue, join the 2 layers and push the cocktail sticks from the "bottom" so they pin the 2 layers together.

But bear in mind that if the area you are gluing is too large, the glue in the center of the 2 layers may never cristalize.

Not very important if you'r making hills, unless in some future you want to cut the hill.

Hope that helps.

Yeah, knew that about the foam and paint mix, which brings me to the next question. Do you use the paint brush technique when needing to paint/prime foamboard? What's a good technique for priming the foamboard and getting it ready to paint?

Just plain acrilic paint applied with a brush.

They make a foam specific Liquid Nails which provides a SUPER STRONG bond. Tacky glue works very well & remains moderately flexible.
CAVEAT: it is difficult to cut through the area wher the glue has dried with a hot wire foam cutter. So plan out where you think you'll be making cuts if you're going to be using that type of cutter.

Liquid nails, or you can go to your hobbie center (The kind mom's goes for hand-krafts, not the kind we go) and buy liquid silicone. It's cheaper and practically the same result.