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Makers and Making: creating large surface for project
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lululatouche
Oct 26th 2009
Hi,

I'm trying to create a large surface for a project.
It should look like a rocky planet with impact craters, something like 4x4 meters or yards in size.I've tried isolation foam but It's expensive and I need more volume . stuff should be light preferably.
So basically any suggestions on similar inexpensive materials would be great, thanks ! !
alankilian
Oct 26th 2009
I don't know what "isolation foam" is. Is it a 2-part mix-n-foam kind of thing?

If so, here's a 1/2 gallon kit got less than $100
http://www10.shopping.com/xPO-Evercoat_Foam_It_Two_Part_Pour_Flotation_Foam

It says it expands to 2 cubic feet, so let's see.

4x4 meters is 12x12 feet is 144 square feet.
2 cubic feet is what? 2'x2'x2', so 4 square feet 24 inches deep.
144 square feet / 4 square feet is 36
24 inches deep / 36 units is about 2/3 inch deep.

Is that deep enough?
lululatouche
Oct 26th 2009
This sounds pretty good,,

Thank you very much .
 Stokes
Oct 26th 2009
How deep do the impact craters need to be? What about getting a bunch of Styrofoam packing pieces (big shapes, as opposed to 'peanuts'), gluing them together, carving roughly the shapes you want, and then going over it with a heat gun and/or spray paint? The paint will partially dissolve the Styrofoam and blend seams.

This might work in combination with the 2-part expanding foam stuff, if it is chemically similar.
alankilian
Oct 26th 2009
Stokes has a good idea also.

You could probably get 1/2 Inch thick 4foot by 8foot sheets of solid
insulation and hit them with spray paint.

Leave a puddle of paint and it'll dig a crater all by itself.

That's what my son does for Warhammer 40K terrain.
It looks VERY cool when he's done.

You'd need five of these, and they are $7 each. for a total of $35
http://www.lowes.com/lowes/lkn?action=productDetail&productId=15348-46086-201549&detail=&lpage=none
lululatouche
Oct 27th 2009
didn't know about paint dissolving styrofoam, thanks guys.
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