How to Make a Fiberglass Subwoofer Box

Step 5 5. Additional Glass/ Removing

You will want to add a few more layers of fiberglass now using the same technique in the previous steps. After a few layers it may be strong enough to remove from the vehicle, it is much easier to do the work outside of the car! You could have problems keeping the contours of the trunk in your box if it is not strong enough, so make sure it is strong once you remove it.. You will need to add about 4-5 (more is better) layers total of glass on the inside, so whether you want to do it inside the trunk or remove the box and do it outside is up to you.

When you do remove your box from the car it is now a good time to also remove all the tape from the box, and inside of the car. Its ok if some of it sticks to the box, you won't notice it. You should now be doing all your glassing outside of the car. Just make sure everything is dried before you place it back in the car