100 first , then F5 is USUALLY the way to go. I have learned over the years that ya just can't tell how an old pot will respond to the Caig chemicals. I have cleaned and relubed sliders with 100,. then F5, or F5, then 100 the De-oxit "GOLD". I do not have a consensus for what ever way is best or the best combination. I do know once a pot has been stripped of its lube , it rarely works smooth again. Sometimes, it can be usable, but never like new.
IF IN doubt, like Perry, I go with the F5 first, F5 seems to be a good and safe first strike. If that doesn't do it, then ya ain't got much to lose, go with the 100, then F5. I do know, it's a better shot before the pot gets "sticky" or hard to turn...