Do You Add Layers to Inside or Outside of a Fiberglass Box?

Hey everyone, I am going to build a fiberglass box for my car but have one quick question. After your frame out the box and speaker rings, cover it with fleece and coat it with resin, do you add the layers of fiberglass to the inside of the box or the outside. If you add them on the inside it would provide alot more support to the speaker rings. For some reason I am afraid of them rippin out if you put all the layers on the outside. Any help would be great, Thanks....

When you put resin around the ring part of the fleece for the first time add acetone to the mixture, this will allow the resin to be more fluid and go thru the fleece easier getting all the way to the speaker ring. MAKE SURE you just glop it on all around the ring and poke it a ton with the brush. I would also suggest putting somthing heavy on the inside the the ring to push the cloth against the ring while it hardens. When thats all done to make SURE the ring stays in (it should neways) but you can flip the box so the rings are facing down and pour resin all along the place where the ring and hardened fleece meet. One more thing. after you fleece i would suggest sanding down the fleece to get as little air bubbles as possible and so the box will be smoother while laying the mat down. any ?'s askdream it, build it, fiberglass it