It's not that hard,
just a shitload of work.
I made the read part of my sub-boxes with fiberglass.
Doing my jdm-console (with 7" screen
with fiberglass.
Gonna redo my old bumper with fiberglass.
You'll love the smell of the resin too
the first 5 minutes it'll give you a bit of a headache, after that, you'll like it