Sealing, smoothing FG and MDF

This is my first fiberglass project. I was wondering if anybody can help me with smoothing out the Fiberglass to be somewhat flush to the MDF on the elges. I was told I could cut off the excess fabric and use Bondo or body-filler to flatten it out. If anybody has any other ideas, or ideas that could be better, I would really appreciate the feedback.

Thanks,

Andy

The enclosure and its rough edges. ^^

Close up on those edges. ^^

Can you grind/sand the edges off? (the rest of the glass is adhered to the box?) 

By looking at the pic you would have to glass the sides to the same thickness to smooth it out.

I could grind the edges off, but I would be affraid that the fiberglass would not be well enough attached to the rest of the box itself if i grinded it off, because the staples for the fleece I had used were placed on the sides that I show in the picture. Does that sound sensible enough? Well, unless the resin had seeped into the wood enough to really end up attaching the fiberglass front well enough, I dont think it would stay strongly attached. I could glass the sides too, but im just planning to lay some carpet over the sides anyways, because I only wanted the part that I originally fiberglassed to be the part that I would later end up painting, or getting pained. So, im affraid that fiberglassing the sides too would be a waste of time and money.

Any other ideas?

on the strands . just take some fiberglass matt and use a fork or some other pointed tool to separate the strands. simple as pie. and you could cut off the the excess and layer some more fiberglass across the front and sides. cause the fleece alone wont be strong enough you'll need several layers. and dsbenjamin, we call that kitty hair or kat hair. its basically harder bondo w/ strands of fiberglass in it. it is just as thick if not thicker than bondo and way stronger. you could use this on the inside for the strength. but it is so hard to sand, somewhat like concrete, its not good to use on the ouside unless you want to build an area up. But if you cut the loose fleece of and relayer with fiberglass like half way over the mdf it should be more than enough