Try warming the aerosol in a bath of warm water - those baby bottle warmers are quite useful for this sort of thing. Aerosols have many downsides - cooling due continuous use is one...This is as i tried but it was not easy. I think between the cold air cooling the canister and the temp drop due to the drop in pressure if the air as it leaves the nozzle it quickly became blocked. Perhaps I should have thinned it down?
...the other thing that is worthwhile doing is to remove nozzles and soak in thinner after blasting them clear with brake cleaner