Curious to hear about experiences using Fosshape for making invisible mannequins on this forum. I've read various accounts online of mountmakers successfully using Fosshape to fabricate mounts. I've also studied tantalizing photos of gorgeous invisible mounts made using the material.

However, I have only had medium success using Fosshape. The main issue is buckling/torquing due to compression [esp. from knit bathing suits] or weight [for ex., large gowns]. The only remedy seems to be completely filling/reinforcing the interior of the mount with carved ethafoam insertions.

Have others grappled with this issue? Is the answer to simply back the mount with carved ethafoam disks? Or is the issue the use of a steamer vs. heat gun [for ex., would a heat gun 'set' the Fosshape harder?]