Bottom bolt door hinge cant get it out????
 

Hi guys my first post, I am helping my son in law change the doors on his 1970 Bug,

Unfortunately the very bottom bolt in the lower hinge on both doors where they bold to the door pillar are seized solid....are there any tricks to get them out,

We have tried an impact driver with no joy...I was just going to drill the heads out but I thought I would ask first.

Nick.