All that you'll need to create a marbled vase is, of course a glass vase, as well as disposable bowls, a few shades of acrylic paint, glass paint medium fill like the Liquitex Professional Effects ...
The best concrete paint depends on the location and function of the concrete. Any good quality acrylic paint can adhere to clean and dry concrete. Never use oil-based paint on concrete.
Last week I wrote about the core artists -- Duccio, brothers Ambrogio and Pietro Lorenzetti, and Simone Martini, not household names -- and how the curators develop core themes in Sienese art.
Acrylic is also more scratch-resistant, stain-resistant, and reflects light more, so your tubes will look aesthetically pleasing for longer. PETG is somewhat avoided by many water cooling enthusiasts ...