Some thoughts for a would be DIY home fiberglass worker.
For years I have done small fiberglass repairs on things like motorcycle fairing, our boat, and even building a MH skylight with it. It is easy, inexpensive, and for the most part, forgiving to work with.
Then we got a MH that had a fiberglass roof with a several surface cracks that didn't leak, but according to the fiberglass expert I had look at it, compromised the integrity of the roof. It was a much larger fiberglass project than I had ever undertaken, and after buying some material I started into the project at home. We live in rural community, but the houses are fairly close together and we have a cat, neither of which I had thought much about before starting. After laying a considerable amount of glass I needed to do some sanding which spread fiberglass dust all over the ground and even some into the neighbors yard. I was protected, but this stuff is hazardous to breathe, ingest, or even have on your skin. After noticing what was happening, I removed as much of the dust as I could from areas the cat would walk in, and from the neighbors yard. Then I took the MH to a fiberglass shop where the dust wouldn't be a problem and had them finish what I had started.
I hope this may someday help someone to avoid the mistake I made by not thinking the whole thing through.
Steve