This is a topic that is often talked about on graffiti sites, but it is nto stressed enough. DO NOT HEAT OUT TRAINYARDS! All this does is create problems for evryone and could lead to you getting arrested or other writers. First thing is first, DONT GET SEEN! This should be a no-brainer. If people see you going into a yard they may call the cops, especially if you have a backpack and look remotley suspicious. When you find a yard to paint in scope it out. Look for ways in and ways out, so if in event of evading somebody you have a quick escape. Also dont get seen by yard workers, they will are most likely to call the police on you because yo uare trespassing and vandelising their property. Secondly, CLEAN UP YOUR MESS! When you are finished painting clean your shit up. Workers check the lines of cars daily, if htey find evidence of graffiti being done there then they will report it. Take you spray cans with you, dont throw them 10 feet into the bush, if you spill paint of the ground kick it up. Make it look like the graffiti was on the train before it came into that yard. Thirdly, DONT PAINT ON THE NUMBERS! Every train has its own set of numbers that it legaly has to have to be on the tracks. If you paint over these the rail company has to pay money to have them taken out of commission and to be restamped. This costs them a lot of money and makes them pissed at graffiti writers. These are some basic rules to follow when painting trains. If you have any more information post it here.