for me it all comes down what I am trying to do
as there are many great products out there but no one does it all !
as for rust preventive sprays, fluid flim, woolwax(and there supposed to be redone every yr,) and like RP 342,( is designed to last several yrs or more) are all just coatings to help prevent rust, once rust starts however, its sort of too late the process will keep going, unless you do something more aggressive like POR 15 which when done right will pretty much STOP the rust from spreading and growing!
as for keeping joints free and moving, where possible I use grease, where its not easy to get to, I use different oils or spray grease, its kind of funny to me, as for decades folks had oilers, metal oil cans they filled with pretty much any oil they could get and just oiled things, and things lasted, just cause they had the belief that oil was cheaper then replacing things! these old oil cans were in about every garage in the USA at one time, and can be found still in many , or yard sales or?? there easy to leave one on a tractor in a shed, or a tool box that will fit one standing up~!
perfect IMO< for using on farm equipment joints!, fill em with what ever oils you like and have at things HAHA!
(see pic's below for the younger generation guys here)
BUT back then there wassn't as many RULES, LAWS and well !! tree huggers crying about a little spilled oil on the ground
if your worried about oil products being harmful to things, you can use 2 stroke oil, its more environmentally friendly oil, or there are special oils that are also!
but in today's world, it seems so many seem to have the r just throw away and buy again buy more mind set!
ANY lube is better than no lube when it comes to keeping joints freely moving, but some things adding oil also adds to how much dust dirt and debris build about things, and that stuff c an hold moisture, which works against you, if you DON"T keep adding more oils to things!
another big part I found for keeping things working, is, where and how you park them and store them
I know we all don;t have big buildings to store everything inside, but there are better ways to sore things outside than just leaving sit in the dirt or on grass
a gravel pad that was sloped to get water away from your"X:" pitching things before gravel down, goes a long way in allowing water to leave from under things and that adds life to what is parked on the pad
same as parking things in the sun OR shade pending what it is!