yes, one should excersize good judgement when melting wax into bow limbs. the same kind you would excersize during the other 95% of the construction of a wooden bow. seems like one would have to be extremely careless to do any harm.
eflanders, I've applied various wax finishes to bows to seal to seal them. beeswax, paraffin, various combinations thereof, and others, and I get the wax and the wood plenty hot. has never caused an noticeable difference that I've ever seen or felt. could you please explain how overheating would soften or harden the wood? seems like it might do one or the other. actually it seems to me that it would only harden the wood, as if tempering, which according to what I read here is nothing but wonderful.