All the best.
I'm sorry to hear you've been bullied, I know how unpleasant it can be. My advice would be don't pretend to be someone else, if your interest is in trains then you should be proud of that. Stand up to anyone who gives you a hard time, they are picking on you because they see you as an easy target. Take self defence or martial arts classes if necessary, you need to show these people you will not put up with their cr4p.
All the best.
So you are getting bullied at school because you have a hobby. What a disgusting thing to hear, you have something to occupy your mind and they have nothing. Easy to see who will be the better person in the long run though.
I had this problem when I was at school years ago and solved it the easy way, I found out a couple of my teachers were into modelling not railways but model planes, ships or cars. So you just got to know the teachers a bit better. I had one bright spark student come up to me one day and decide to tear a strip off, of me about my hobby. Well he started to and then one of the teachers with a hobby stepped in and simply said to him and I quote " What do you do in your spare time to keep yourself occupied". The bully started to mumble something and the teacher then said really loud so that quite a few could hear it " Just as I thought another useless A hole that will not be able to fix a leaking tap or something".
The student was still mumbling some kind of excuse when again the teacher said to him, "I have model planes, why don't you try it on me". By this time all and sundry around the place were laughing not at me but at the bully. He slunk off never to be a bully again, well not with me he wasn't. It also helped that our science laboratory technician was into model trains as well so I could join him for lunch in the science techs room and we could shoot the bull a bit.
This isn't the 70's. You can't go around punching people in the face to win an argument or make a point. Can you out bully the bullies
Keep it in perspective and don't make yourself a target - your hobby doesn't need to define who you are. As an adult you'll learn that you need to show a different face to different groups to fit in (i.e. play the game).
Remember you have to interact with the other students every school day. Take on the world you'll probably lose.
... And in response to Cootanee, that's why I seem to 'take on the world'. Because at my school (and same can be said every school), if you're different in anyway (I.e interest, or whether you have autism etc) you're on your own. Just now, I don't have anyone to 'back me up' when I get in certain situations. People just walk past and continue. But if I don't defend anyone in their own grief with others (even if I don't know them) and just walk past and continue, I'm seen as 'inconsiderate', 'ignorant' or a 'dog', which I've been called in the past. And I'm not sure if talking to teachers or the principal would be the best solution. However, I've talked to relatives and closer friends from Sydney about my issues in school. I've also talked to school councillors about my issues as well. ...