Is there some do's and don't when it comes to spray painting Nscale track? I am in the process of weathering the track with Tamaya spray paint and so far I like the results, but I've noticed a few electrical conductivity issues where the connectors fill with paint and decrease the power going through the rails. Any good tips out there? What about spraying Peco Insulfrog turnouts? So far, I haven't painted them, but I'd like to - without ruining them.