Hi there Nothing to do with the Virus, the regs are worse ever year as prices rise on shipping anything.
All common carriers Post/Fed/UP have tightened restrictions in recent years, eg Li batts, Haz mat, chemicals, and Aerosol.
Blame the liability lawyers.
Suggest to take the numbers on the can, check with a Pan-tone book, and get a custom (NON aerosol) mix at a good paint store.
Of course, it must be an oil based lacquer, so many jurisdictions (EG all of Claif) will prohibit due to VOC.
Will they ever just let us be to do our work?