Here is my recently finished detailed Aust NRail RTR Series 1 T class. My goals with this loco was to see what I could achieve with only minor additions to the RTR body. The body was a little out of shape out of the box with it having a slight bow along the length. I have heard of people using hot water to soften the body making it easier to mould into shape so I thought it was worth a try. Firstly I heated up body in hot water from the tap, however it seemed this wasnt enough so I soaked it in hot water from the kettle. Slowly it was easier to shape without any damage. This method worked surprisingly well but did require some fresh hot water on about 4-5 occasions. I then let it cool by itself on the bench. Using the detailing parts available from Aust N Rail (http://aust-n-rail.com.au/category15_1.htm) I began by adding hoses and wipers prior to a decent helping of weathering chalk. Following this I added glosscote lacquer to the windows to give it a bit of extra shine. I am quite happy with the result (plus I had great fun tinkering!!) and it still leaves me open to adding more details at a later date such as end handrails and liftrings.
I hope you enjoy and if you have any question send me an email. email@example.com