
https://youtu.be/iSMjvrAQtlg
I think these videos are related.

Poor Mans Fiberglass PMF Tutorial, Tips to get PERFECT Corners! Foamie, Vespa Teardrop
https://youtu.be/S3JIyhbdi-Q
NOT Gorilla Glue! Watch This Before Building a Foamie!! BEST Adhesive
https://youtu.be/0Uz9YeehLU4