djb

Hi, I'm usually in touring and occasionally in the mechanics section. I've bought a used steel bike that has not been ridden much, but has some little rust issues.
It's a 3 or 4 year old Surly Troll, and I plan to take the hollowtech bb off, partly to learn how to work on them, but also to make sure everything is well greased. I'm going to open up the hubs as well, so that I'm sure of the condition of all the bits and not have any guessing on grease quantity or contamination.
I figure I can pull the fork off and do a frame saver job while it's apart.

It seems that the spray cans of Frame Saver" are not easily found around here, so do you have personal experience using linseed oil, or other products?
No matter what I use, I realise I'll need to be careful of the bb threads and not let them get gummed up.

So from experience, are the canned products worth getting, or are things like Boeshield or linseed going to do a reasonable job?

The bike was kept in a damp barn like structure, there is just a bit of internal surface rust in the tubes, so I figure it's worth taking the time to do this now when I take things apart, and then never think of it again.

Any suggestions, comments or preferences would be good to read.
Thanks