Thanks for all the comments - they're very much appreciated.
>>I find my steel wheels, with trims, a pure pig to clean. So much so, I leave the trims off during the worst of the winter weather. I found alloys much easier to keep clean. I used Autoglym Alloy Wheel Seal. Just sprayed it on after every washing and the next time I came to wash the wheels, the dirt just floated off.<<
I would normally take alloys off every 6 months and clean thoroughly - then polish with autoglym. I'll look out for their Alloy Wheel Seal, thanks. Never bothered much with steels+plastic trim, I just jetwash them and don't really care much beyond that
Culzean - thanks for the pictures, I will be watching the discs.
I'm also considering putting something over the airbox intake - some sort of mesh. I've had problems with rodents before and it looks easy for them to get into the airbox.