One thing I forgot to mention about using Gorilla Glue: If you are trying to bond felt to steel, aluminum or any other smooth, non-porous surface, use some 60 or 80 grit sandpaper to scuff the surface and give a physical "toothy" grip.

Alternatively, put a layer of double-sided carpet tape on the metal, with the Gorilla Glue applied over it. The felt will soak the glue into the fiber and it will then attach firmly to the taped surface.

This is the tape I prefer:

https://www.shurtape.com/products/df-642/

Fiberglass or gel-coat surfaces are porous enough that the tape is not required.

Use nitrile gloves when working with Gorilla Glue. It is hard to clean off your skin without the aforementioned 60 to 80 grit sandpaper. It takes about a week for the residue to wear off if you don't wear gloves. About the same time it takes for the sandpaper damage to heal. Your choice.