i'd leave the tutorials to those who are 'experts'....but a step by step of how you approach painting oss oriented motorcycle parts would/could/may be of interest to site users...
i've painted plenty of cars/bikes/helmets/etc.... we used to hold sm designs airbrush classes in our garage/workshop/paintbooth
with the age of the internet a lot of 'black arts' are up on youtube or have dedicated forums.
painting is easy..... but prep work and years of fuck-ups is hard to master and takes time.....
....i'm not trying to shoot you down baldrick, every painter/bodyshop/artist/etc i have ever met have their own approach to prep/paint/equipment.