I am an Ironworker have been in the trade for 11 years now. Started at 21. I never really had any problems like that, I guess I was lucky, but I know many that have and I bet the guys bugging you had it happen to them, likely worse. I know it must bug you but I would say just let it in one ear and out the other and %$# them. Don't let it bug you after work either,it is a waste of energy. Just go to work everyday , work hard, learn all you can and take pride in your work, and try not to give the pricky guys ammo to bug you. Before long you will write the test get your c of q and if anyone bugs you then you make them pay, if you lose your job just go to the hall and get another one. Try to not let it show your bothered by the idiots, if they don't get a rise out of you they may stop as the fun is not there for them. Just don't give it up, finish the apprenticeship then you got something to fall back on even if you decide to do something else. And get your welding ticket, it really helps get work. I am just working on mine now, sure the money is good but you only get paid when your at work and around here it is hard to find full time steady work and most welders are usually always working. Also remember most of those older pricks are going to be retired in the next 10 years or so and then us younger guys can be the pricks if we should choose to. But me, no, I give respect when given respect and see no thrill in unwarranted abuse. These guys are supposed to be "brothers". Anyway that's my 2 cents from a fellow union brother, just have tough skin and think of the money and realize those guys are nobody in your life and and who cares about them.