depends on the Damage. if it's pretty serious cracks, where there are visible parts gouged out of it, Bondo (Isopon 38 is the closest equivalent in Europe, don't know where you live). cover the damage over, fill the cracks, then sand it smooth. of course if bits have actually been broken Off, you'll need support underneath the Bondo.
i mean, being that Bio's are from the looks of it Standardly Resin, which i'm guessing this one is, that should do it no problem.