Won't help the door latches at all doing it that way. That only helps the lock cyls. ANd I THINK the referenced lube is heavier than the colloidal graphite you refer to. It is noted as "multi-purpose grease"
Neo 1:11 is a penetrating or creeping spray multipurpose grease. Chevron FM EP is food grade, but will also work. KC SlipShot is a red penetrating grease, and some of the clear lithium greases are good too. I am not a fan of "lubriplate".
Wurth HHS 2000 is possibly the most widely available (proffessional product) and is excellent - as are MOST of Wurth's products. Pricy, but usually worth it.
I have used Castrol Motorcycle chain lub - very effective, but dirty black.
For noisy door check-straps (a big problem on a lot of Mopars - and some Fords and others) I use anti-seize. Anything else generally lasts just long enough to get it out the door.
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