I’m only guessing but I’ll be surprise if the security check are as rigorous as the package won’t be going on a plane. Perhaps using the magnet trick will be effective?

Probably it's a silly comment, but I have always assumed that these "artists cans" were empty, so I thought that the security-related small prints don't apply to them because they don't contain gas or flammable products.

Once I've exhausted the can (thoroughly so there's no sound of escaping gas when you hold down the cap) I puncture the base with a nail (on a piece of wood that's bigger than the can base), while it's covered with an old towel. Then if you stand the can up and leave it in a warm room (not my sub-zero barn studio) the remaining paint will dry and capture the steel balls inside too. Pack the can in foam or bubblewrap, then a cardboard outer and add a photocopied piece of paper stating that the aerosol can is a decorative object, has been drained of fluid and gas and is not under pressure.

there should be no issue specially when you send it in the same country, there are tons of onlinestores selling spraycans and they also send it with the normal post. i just recived 360 spraycans with the post no problem....

Whoa

Thats a lot of paint

show us what you do with this paint stuff

Please :-)