Quick questions, do I need to do the full monty washing every time (i.e every week ?) or can I shorten it and do a full wash every so often ?
on another thread the guy said he clays the car every 6 months or so as well, is this OK ?
all depends how dirty the car gets.
you can get away with only waxing every 6 months, but you have to remember that if you do something that takes it off, you need to put it back on eg if you polish / clay an area then you're also removing the wax.
i recently bought some Klasse AIO which is a glaze, sealant synthetic wax which i've started to apply straight after the shampoo, this is a product that can be layered and give a nice sparkle without polishing. I like pure waxes so i put collinite on top of that, but you can get awy with just a synthetic wax
re clay, every 6 months is about right, but again depends where you park and how dirty the car gets. eg if you park under a tree and get loads of sap / bird mess etc on then you'll want to do it more often. if you park in a garage and the car never gets rained on you can probably get away with once a year. a mild clay like the sonus isn't going to hurt the car so don't worry about over claying.