Becoming a fabrication guru

In a tandem post to Tony's electronics question, I've seen a number of people here post about making their own stereo dash adapters out of fibreglass and whatnot. Where did you guys learn how to do that, and where can I learn?

Although there's a much higher signal to noise ratio, there's a ton of good information here.

I took an auto body shop class at my local junior college that taught me just about everything I needed to know for this kind of thing. They cover beating metal, welding, and fiberglass.

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Although there's a much higher signal to noise ratio

A statement that holds true when comparing any forum to this one.