In the back of my car, there is a small area I want to use for an enclosure. Today I tore off the panelling to find a plastic "bowl" molded to the contour of the body. I want to use this as part of the enclosure. However, the plastic is not quite rigid enough (it is stiff, but pushed hard starts to flex, the same stiffness of trim panels). How can I make this "bowl" stiffer? Do I have options other than glass?
Thanks

 

Use it to make a mold out of fiberglass.

 

kinda ghetto....but some long strand fiberglass bodyfiller may work....I have used it with good success...not sure how it will stick to plastic....just try it

 

Id use resin/cloth... if you are itching to blow cash use epoxy & CF...

 

A coat of Rock Guard from Canadian Tire, should do well enough, depending on what you plan to put in there, woofer size, frequency range, and power?

 

any type of fiberglass or body filler will not stick to the plastic permanently................

 

Eli:
- Woofer: 8" (eD 9Kv.2)
- Freq range: 32hz - 150 hz
- Power: 250 - 400 rms (current amp puts out 250, but I'm looking for something new with 100 - 150 watts more.)
- Is this within the workable range?

Tim:
You said that glass won't stick to plastic right? What would happen if I didn't use fleece or any other type of mat, but just applied the resin straight to the plastic?

 

If you plan on using it for sub bass, I'd say it won't work as well as 2 part epoxy.
So get enough 2 part epoxy, and work as much of it as you can on BOTH sides.

 

Allright, it looks like I will need to use glass in some capacity. So, I will only use the plastic tub as a mold. Thanks.
Will I need mat/fleece, or can I just brush the resin right onto the plastic and break them apart from each other after the glass has hardened?