Guilder Automotive Acrylic Jet Black for Tubular Railings.  

Guilder Basecoat Jetblack
Ratio : 1part of Jetblack and 2parts of Acrylic thinner
Guilder Expoxy Primer
Ration : 1part of Galvacoat and 1/4 of Catalyst and 1part of Epoxy Reducer Note never use acrylic thinner, tho it might work but the adhesion is only 60% compared to Epoxy reducer.
Sandpaper
#400 and #240