fiberglass inside, instead of outside?

I was thinking yesterday as I was driving home about glassing. Then I thought about how much easier a project would be if you could glass it from the inside instead of the outside. Then you could just put your bondo on the fleece and as long as you stretch it nice and tight like you should. It would take just a little sanding and you'd be smooth as glass, not fiberglass. hehe. Instead of having to sand down the glass and then bondo and all that.

Does anyone do this? How from the speaker hole and just reach in or do you cut a hole and then patch it later?

Are you serious?!

I agree that it would be simpler to bondo fleece but this would only work if the enclosure is in two pieces. Once you've glassed the inside of the "Cover" you'd attach it to the enclosure. But how would you do that?

If the fleece is attached to the enclosure already, how would you reach in though an 11.5 inch hole with both hands and see what you're doing? How would you make sure all the bubbles are squeezed out and that you have a sound structure?

I could have made a play on words with your username name but prefer to refrain.  Prove us wrong and build a box with many pix.

I could be wrong.

I once asked who the hel* would want to see a bunch of guys losing traction on purpose when even a monkey knows how to push a gas pedal to the floor until HP overtakes rubber adhesion. It ain't talent - it's contrary to what they teach at drag racing school. Yet - drifting became a phenomenon. DOH! 

So anarchy do you cut a section out of the mdf? I think im lost on that part. I was thinking of cutting a section out, on the projects that have the glass touching all the mdf. Then reattaching what you cut out once you get done. With liquid nails, then laying some glass across the top through the speaker hole.   

very nice work anarchy.