Waterlox - Tung oil questions

[KenM]

I was searching some past threads the other day and came across a post talking about using Waterlox as a sealer .
After reading some labels on the Waterlox cans in the Ace Hardware the other day I'm a little confused.

Is Waterlox being used as a sealer before priming and painting or as a finish coat after painting or both sealer and finish coat?

It comes in different flavors, Original and Marine in both sealer and finish and there is also a Urethane finish ,which ones should I get ?

I have some "Behlen" pure tung oil I purchased from Grizzly.Can I use this the same as I would the Waterlox?

I've only made a handfull of plugs so far using red cedar and haven't been taking the time to seal them. Thought I would give the Waterlox a try and since it's a little pricey I was hoping to get the selection narrowed down a little beforehand.

I want to thank everyone on the site for all the great info shared also.
Thanks,
KenM