There is some type of coating that doesn't allow anything to stick to it. That i...

u_me_him on April 19, 2016 | parent | context | favorite | on: Solar is now cheaper than some coal, says India en...

There is some type of coating that doesn't allow anything to stick to it. That is a start. I think is called enduroshield. It is not a permanent solution because it wears down but it would help.