i think undercarriage cleaning is relatively simply and safe, just spray some chemical and jetspray it off, any carwash with a ramp will do the job (such as in petrol station)
thanks mates. most of the ramp i ever come across were meant for lorry. and man, those jet spray looks scary the pressure of the water could peel the paint off!
come to think of it, quite hard to find the ramp around KL / PJ though. any ideas?
if you come from 16section roundabout,turn into Jalan University go down till u see the KFU...thrn in there and the shell is opposite the KFC....they do a reasonably good job