Sorry I thought I closed this thread but it seems I never posted my last response. Thanks a lot for all your input. @awerby I know that the material will ned quite a lot of work. But the toothpast material hardens immediately when I add a second component to it, so what I intend is to have one layer "toothpaste" then with a second print head add a layer of hardening component then repeat. Since it hardens really within seconds I'm afraid that I would just clogg any mixing nozzles...
Thanks again for all your help, I do see now that this project is gonna be quite a bit trickier than I thought at the start