The only sure bet is to do a test with the exact cloth you will be using.  Glass some onto a scrap of wood and see how it looks.

   Thanks, yeah, I will definitely test it, but it is not cheap and I was hoping to find out if it at least has a shot at working before I purchase it.

   Polyester fabric is used as Peel-ply to make your glass fabric smooth and will not stick to your cloths. It is heat treated when manufactered. If you want to use cloths, try cotton or something along that line. Test-Test-Test. Good-luck.

   It's not so much about epoxy sticking to the fabric as getting through it.  The fabric is entombed in the epoxy, but enough needs to link from the one side to the other to keep the fabric from weakening the bond between the fiberglass and the wood.

In other words, waterproof is bad, but a synthetic with lots of holes is probably fine.

I used a cotton weave on mine, and it came out fine.  The thing to keep in mind is that the fabric will appear as permanently "wet".  On my cotton cloth, this means that areas that were white are pretty close to transparent now, just like a wet shirt.

-Matt

   Depending on how you define 'decorative' have you considered some 'highlights' using twill weave carbon fibre cloth ?

It is naturally compatible with epoxy resin and catches the light well

Obviously for highlights the old adage "less is more" applies :)