Guys,
Castrol make an aerosol of "Chain Grease" it has a tube attachment to it's push button so you can spray the stuff down the outer - it will run for a bit before it semi solidifies. Should do the job you want

Cheers!

Robbie
2021 Plus Four -- Helga
211-WX-1433

"Fettlebodge"--A chief of the PaddyMogs