Propane Tank Store… Tip# 10
Can I paint my own propane tank?
Caution is needed when deciding to paint a propane tank. White and silver colors are the most common used for a special reason. These colors reflect more of the suns light/heat than other colors. Dark colors absorb more heat and thereby increase the internal pressure.
Additionally, paint used for propane tanks needs to be able to expand and contract with the steel of the tank.