well i work in a Major cabinet shop producing kitchens , and we have to keep the humidity at at least 85% 24/7 to keep the product stable during production .
and the machines most are bigger than my Bolt ..when ya go to take a bearing off a shaft or any other maint issue with a part that has been on for a long time, sometimes yrs !in that humidity are rusted fast ....we found that PB BLASTER and patience ...im not talkin days ...but a good amount of hrs ...THE STUFF JUST WORKS !..
never had to soak a stuck motor down ..but i would bet you would be suprised !try the PB