If the model is to be looked at and will be used to showcase the look and expert finish of the model then it matters... if the model is for wargaming and might be that it is just painted three colours... No Sweat... Horses for courses!!! I agree though that the models shown off by GW should be perfect although their full units will have moulding lines due to the amount of painting required to keep full armies of every figure they produce... Though I would prefer to see their showcase figures i.e. those used on their store pages were finished and painted to a far better standard.