Yea, I remember reading that and wondering what they were thinking of.
I understand that you want to have enough grit to get a slurry going, but wasn't convinced to go coarser than what I finish sand with.
Another thing to avoid is using their sealer / filler product. I tested some on a walnut project I'm working on and was less than impressed.
I've used their stock and sheen product and like it though. Its a very fine pumice / rottenstone type abrasive in a liquid medium.
I've found it best to let the finish cure for 4 - 5 days or more first before using it. Too soon and you will cut too fast and get witness lines.
Another Tru Oil tip, (as per Birchwood Casey techs), you can thin it up to 50 / 50 with mineral spirits and shoot it through a gun.
It uses / wastes more material and takes a little longer to dry, but is nice for laying down a nice smooth final coats.
On my setup, a 2 part oil to 1 part spirits worked ok.
They sell the rattle cans too, I picked some up for testing so we'll see how that goes.