I was wondering if it was possible to dissolve the PU 80 low density model board in some solvents after having laminated a CF cloth around it ?

My idea of a case was more something like that http://www.technologytell.com/apple/57482/iphone-4-cases-2/ (the first picture on the webpage). Something I could slide the phone in and out. Then I need to wrap the CF around a male model of my phone. A dense wood would definitely be better but the balsa helps me to obtain the right thickness as I will cover the inside of the case with some soft fabric to protect the phone.