Shiny brake pipes/ any bare steel etc. To keep them fresh with no rust or tarnishing, use JADE OIL. You can get it from artists shops. wipe it on and let it dry. It is not a varnish so brake pipes can be polished and done too with no SVA problems. I've used it on copper and steel parts that have been left for a year, they still look untouched !
my landrover drag steering ball joints look brand new after 2 years !