I just decant do it.

JD 著者
How I decant rattlecan paints. I have since learned that you DO NOT use plastic lids. Shortly after this, the chrome one exploded because the propellant will expand, eat through the lid, and become a paint bomb.
Glass jars with metal lids only. Also make sure you use the right thinner. In this example, I have found that some of the Rustoleum metallics prefer mineral spirits over lacquer thinner.

Bill Newcomer
Rattle cans are pigment, solvent and propellant. You obviously need to let the propellant out completely before sealing. Outdoors preferably.

Martin Oostrom
This works like a charm. Just let the cap off for an hour of 4, then gently prod the paint with a stirrer and most of the gasses will be gone. You've got to be careful with the stirrer though, one millimetre at a time!
Youtube Video