The earlier ones or the thiner ones can be very bendy. However most of the later ones are still usable to repaint.
Unfortunatly all the spidey sculpts are rubbish and VERY bendy 
Disagree there mate, I've got this one:

If you cut and turn the web firing hand to the right position rather than 'sign of the devil dude', and clean up the flashlines, remove the webbing under the arms, (not to everyone's taste), undercoat and paint it comes out really nicely.
Can't post up currently as still transferring from AOL's failed photostore but worth looking at.