What is the best way to stop the rust in the inspection lid hinge?

 

 

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That's a good question! I don't know. Part of the problem is using something that prevents further rust with out locking up the pivot points.

Maybe treat the area with a conversion product and then keep it lubricated to prevent corrosion...

That SEM rust inhibitor works good but it turns blackish after applying.

Gibbs oil, http://www.gibbsbrandlubricant.com/

WD-40

16 hours ago, grannyknot said:

Gibbs oil, http://www.gibbsbrandlubricant.com/

I absolutely agree---much better anti-corrosion  and lubrication properties than WD-40 in my personal experience.