As a further research we had to look up 3 tutorials of 3 different materials listed in the report we wrote

I've chosen to go with modeling foam, gold and wood

Wood and modelling foam becease we are probably going to work with it a lot.

And Gold because it is not common, so you learn more

This is a short video to see how someone else works with modelling foam and what tools he works with. You can learn a lot by watching other people work.

This is a video on how to make modelling foam yourself. Can come in quite handy`.

In this video you can see someone casting with the modelling foam. It's easier to make difficult and detailed shapes.

Modelling Foam

Material Tutorials

Here you see somebody working with goldleaf. It can be a nice addition to a painting, since it is gold I added it to the tutorials.

This video shows the process of making a gold link chain.

In this video someone makes a gold ring from scrap gold by sandcasting it.

Gold

Here you can see different things you can do and make with a lasercutter. Not everything that comes out has to be 2D... :)

Here you can see some presice modelling of arcitecture. Maybe it can be handy for mockups.

This is a tutorial for bending wood. A technique that may come in handy.

Wood