Most car shops will now sell glass fibre matting and cold cure two part resin. Wet lay the glass fibre matting on the back of the crack / damage and make sure there is plenty of overlap so as to reinforce the damaged area. On the front side use the resin to fill the damage and sand it back, if the crack is too large then fill with normal car filler. All ready for painting.
Alternative is to find a local manufacturer of glass fibre components, not necessarily fairings, and offer them some beer money to sort it out for you.
I'd be tempted to get some fairly low grade sandpaper on the inside just to give it a good key to grab hold of as such. Think most of the process has been covered by the sounds of it above.
Yep, abrade the surface to give the new glass and resin a good key ..... basically sand the surface back to remove any shine, silicone etc just as you would if you were painting the surface. After sanding wipe the surface with a cloth and thinners to degrease the surface prior to applying the glass and resin.
17-May-2005, 18:30 
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