first try at fiberglass

Bush a coat of resin on the surface then apply the matting over it, use a brush to dab more resin onto the mat so it is completly coveRED / soaled in resin.  Let it dry then repeat.  Layer the matting over the speaker rings but only apply resin up to the exteral perimeter of the circle (ie where the fibreglass will meet the MDF speaker rings).  If you want to glass over the speaker rings you can, but u will only need a few coats over the rings.  Once its all dry you can use sicssors to cut the excess un glassed mat from the inside of the rings, and give it a good sand to ensure that the fibreglass dosnt protrude inot the speaker rings area (ie. were the actuall sub will be sittitng) 

Hope this has helped, any other questions, keep posting.  Goodluck

How many layers have you put on so far?  Put a little bit of glass on, and the n wait for like 30 seconds and apply the matting.  Once this is dry it shuld be rock solid and held in place.  You can apply more mat and glass while the previous coat is still tacky or you can wait till it totally dries.  Always aplly glass then mat then more glass.  The actuall glass is extremely weak without the matting to reinforce its structure.  You can use silicon to seal the box, or you can apply 2 or 3 coats of glass and matting to the internal corners to make it all air tight.  Im in Australia so i havnt used either of these products, but usually it dosnt matter what brand you use, usually they will all stick togethor.  Pic wuld help me alot, good luck

I am new at fiberglassing and this post and reply also. I was lookinbg at something someone had posted a while back. It is exactly what i am wanting to do with mine. Except with a 15 instead of a 12. He gave a some good pictures but didnt explain how he did it very well. I was wondering if someone could look at the pictures and give me a better description of how he did it. I can do all the way down to where he puts that black cloth on. How does he get the cloth to curve like that, and to  stay curved while he is putting on the glass? If anyone has any pictures of how they went through the whole process i would greatly appreciate it.