marquipt lubrication recommendations?

lots of moving parts on these babies. what do you recommend for lubrication on the pivot bolts and caster posts?
there is some sort of black grease on the caster posts now.

thanks

No lube.

They come with nylon washers to ease abrasion as they adjust to movement.

The only thing I put a little water proof grease is the shaft on the wheels so they don’t Get stuck. I remove mine when traveling.