I took my in progress trailer rig to get sand blasted the other day. While chatting with the folks there on how I was planning on painting it, he mentioned something about just using veggy oil on the bare metal and thats it. He said once it gets baked on, its as good as paint and will start to darken the metal after a while. Has anyone heard of this and does it really work? It might be kinda cool to do that to the firebox since paint doesn't last long on it anyway. Get it all polished up and oil it down.