I do not no as it was just an option I added incase, I can paint a tube tomorrow and let you know what it looks like if you wish soon. it would be lightly blasted to get an adhesion surface and then paint would stick to that so it wont be as shiny and kind of a matte roughed up surface effect
.. One question is Google correct on the price... Price for the 1G is £387 (pound sterling) shipped that equals 472.99 US Dollars!!!!! if correct that's a big pill to swallow. Anyway best of luck