Thanks Trolling. What do we spray in there to keep the lock fresh?
After being up north for 3 months and then struggling to get the lock off the locking pin, I sprayed the life out of it with WD-40, let it sit, and was finally able to get the lock open. To be honest I think any liquid would have been ok as it was just carrying the dust out of the lock. I then soaked the whole lot in kerosene thinking it was applying a bit of a coating to the whole thing.
As an after thought I wrote to Talon and asked their opinion, and a nice lady named Laura replied with this information in part :-
As for cleaning the lock with Kerosene, this actually leaves a film in the lock cylinder which can cause the dust to stick making the lock less smooth to operate. Australian Lock recommends the use of Shellite or X55 to clean the lock and then once try use a dry lubricant such as Graphite powder. Any oil based lubricants used in the lock will also cause dust to stick. A form of paint thinner can be used to clean lock although this does cause the cylinder to become extremely dry in which case INOX can be used as a lubricant as it tends to dry without leaving an oily film. Never use graphite if you have used INOX in the lock already as this will also cause the cylinder to cease.
As a result I now use Inox.
Talon also recommends a cover to slip over their locks, which they sell for about $4.
Hope this helps.