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