I prepped by sandblasting my axles and then ensuring all grease and dust was gone by washing with parts cleaner before applying the Molten Zinc aerosol spray (1.5 cans per 2 axles).
I then left this to dry in the sun and left overnight before overcoating with CIO (aerosol cans) These had the same coverage as the molten zinc but I used 2 cans on both the axles (3 cans in total for all hubs , stub axles, swivel housings etc ... )
Only slight problem was the variable delivery nozzles were temperamental (black with red adjuster) but the other nozzle in the lid did the job!
Coatings seems very durable and fairly chip resistant. would buy again!