There is no hard evidence that Patrick Swayze, the late actor, (or indeed Sebastian Bach) had any relationship or interest in model railroading. In the show, Bubbles is quick to convince Julian, when Swayzie's name is mentioned in his presence, that he isn't talking about 'that' Patrick Swayze. But given that Julian has a deep dislike of being reminded of his 'Dirty Dancing' days, it's unclear if Bubbles is just saying this to avoid an argument.