It is not to bad really as I dont let it get very dirty before I clean it. Solvol Autosol for the alloy and S/steel parts and Autoglym show/and/shine for the paintwork.
I hate seeing dirty, oily, rusty engine bays.There was a RS500 in for a service where I go and it looked like the engine bay had not been cleaned for 20years!
It was a £45+K value car but it looked rough to me.