Au bain marie

We did some test with au bain marie,we put the foam in a vacuum back in boiling water for 15 minutes and it worked very well. The foam good easily bend in all kind of shapes.
I got this trick from my supplier sp-bac and he did gave me also document about thermo forming.
We did buy the heater to boil the water at this shop http://www.dompelaar.com/ , it is a 2000W one.
I made a big basin for the real stuff so I can form plates 60cm wide, we shall do this outside the shed because you don't get all the vapor inside.
Did some testing to see what kind off screws I need for the foam and the battens and I came to the conclusion to take 4x30 Philips head.