Shark Performance In Scotland
Best bet is to try some Eezit. Squirt around the head of the bolt so it seeps down the shank and gets into the nut. Now this stuff will work if you leave it long enough as it works on capillary action. It will soak into the threads and loosen off what is making it stick.....as soon as you overcome stiction then all will be fine. See if you can get into the nut and soak that aswell. A pair of 90 degree long nosed pliers should be able to reach the nut to hold it BUT you must let the eezit do its stuff first.