Hi Chris Very nice love the King Tiger (must get one or two),I wouldnt worry about the tracks Just give them a good run on all sorts of surfaces they will soon be looking well worn and muddy,Ive tried all sorts on my tracks Red Primer then black paint after running around most of the paint is trashed so now just fit bare metal and run them dont bother with paint or rust, wet mud works the best then run on concrete flags leave to dry and do it again.