I use DIY lanolin and Isopropyl Alcohol 99% mixture to lube my cases. I put 20 or so cases in an old Tupperware bowl and apply via spritzer. I start them standing up in the bowl and spray at a shallow angle to hit the inside necks. Then swirl a bit and two more spritz.
This method gives me very consistent shoulder bumps. Then, they go into the tumbler for 30 minutes to clean them off.
As for neck expansion with mandrel. I started out with imperial dry neck lube. Dipping the case into the dry lube and tapping off the excess. What a freaking mess. So I put the dry lube in an old pill bottle.
Then I cut open a 20ga #8 shot shell and used the lead shot and a pinch of the dry lube in the bottle. Shook it up, and dipped my necks that way. Add more dry lube after you notice the neck expansion get harder. Should last at least a hundred cases or so per pinch.
Still messy, still slow, and sometimes I would fling lead shot when they got bundled up and jammed in the neck right way when doing this process.
So I took a different pill bottle and made a DYI dry lube brush applicator.
It's an extra handle I have that is threaded to fit all kinds of reloading tools and is the same threads as cleaning brushes. Connected a nylon cleaning brush to the handle through a hole in the top. Inside the bottle is a half pinch of dry lube and 50 or so pellets of #8 shot. The shot is there to help agitate when shaking.
Works perfect, minimal mess, and I can do 8-10 necks before I need to re-insert the brush in the bottle and shake it up for more dry lube. If I did not have these parts on hand, I would have gotten the Forster brush kit. But honestly, I think my solution might be a bit less messy.
