alright im kinda new to trains. ive only been painting them for about a month or so. i havent ever painted in yards yet but where i do paint its the trains that stop for a couple days and where workers unload them into werehouses and such. just wondering if anyone else paints at these places, if they are safe to paint at (getting caught, hurt, whatever) also, whats the difference between these and layups? thanks for any information, i dont want to find out ive been getting lucky and one day get caught or killed.