Wax oil is good for internals ....I also coat hubs...inner wheels... AND suspension in a layer of waterproof grease....plus you're brake assembly and cable terminals.
You'll find all these will soon get covered in road film grit and dust forming a protective barrier...it works
My VERY FIRST job is always to replace ALL roller washers AND split pins with stainless steel equivalent!....these tips will save you a lot of grief...time ...and expense! in the medium to long term.
Keep all grease nipples well topped up and wash down regularly ...also spraying the towing hitch and front end and the lighting board holders with corrosion guard when dry works well