When finished, if you have cleaned your vehicle away from the port, you will NOT be able to drive it to the port. You'll have to take it on the back of a truck so it doesn't touch the road.
Take photographs of the cleaning process, to show to AQIS (quarantine authority) in Australia exactly what you did.
There is a place on the port which has the contract for cleaning the Australian Army's vehicles. Called "Hera". I discovered this later, after I'd found another cleaning station. I used a company called "A1 Services". It is a company run by practical and enthusiastic Australian guys, specialising in mechanical repairs, cranage and trucking services. They had a pit and jet washing equipment: hence using them gave the full service. They also knew the requirements of AQIS.
Whichever company you use, YOU should be in there, getting dirty and wet. This is the only way to know what has been done, and that it has been done correctly. Remember, your standards, and more importantly, those of AQIS are incomprehensible to most East Timoreans. If it fails the AQIS inspection, you'll be the one paying the high cost of the reclean or the re-export back to Dili, whichever AQIS insists on.
For a standard vehicle, allow at least a FULL day for blasting. I spent two and a half.