sorry i have no experience of galvanisers. scottish weather is good at keeping the dust down (rain rain rain and rain ). jcb recommend that black waxoyl is used on sliding boom parts on telehandlers but left to dry before being put back to service. when dry it works very well not tacky or sticky. it goes like plastic. don,t know if you can get it in u,s. made by tetrosyl. if you can get it have a try

I am not all that sure about wear strips ALWAYS needing lube, I have seen some applications (brick yards and concrete plants, and Galvanizing yards) where adding the grease would just add to the grit.

flat rubbing wear strips always need lube , agood coating of ptfe spray is as good as slapping loads of grease on there. but coldstores need daily treatment of sliding parts AND chains especially or does anybody know a good brand of spray for coldstore chain lube. regards from bonnie scotland

most mast manufacturers I have spoke with use a sealed bearing on the part of the mast that uses roller bearings, and they recommend NO grease in that part of the mast. all greasing will do is cause the bearing to not roll, producing a flat spot even sooner.
Also some flaking on a new mast should be considered normal, as a properly shimmed roller should not ride in the flat part of the mast, but tightly against the curved surfaces in the right angle of the "I" beam and not on the wide flat surface of the roller, but in the curved area.
Lube is recommended (usually) on the surface of what might be called a "wear strip" or "wear button" between the channels (a brass or 'oiltite' flat bearing surface).

The mills i've been in have the same problems. the best fix we found is to not apply any grease. The bearings may wear out sooner, but not as soon as when they are clogged with greasy yarn

how is the yarn getting in there?
is the place a mess?
sometimes the solution is to keep clean rather than blame the grease
attack this at the source of the problem not where it ends up

Might want to check the manufactor.Not all masts require lube some are run dry.In the end its kind of like shrink wrap it will find its way where you dont want it to be.