I typically use 1.25" drywall screws..
The hole in the back is at a slight angle, so the weight will pull it to the wall.
Ideal Spacing is 2" between tiles.
This puts screws at:
7.25" apart horizontally
10.5" apart Vertically.
(see How To video)
Yes! Enamel is extremely durable.
Essentially it is glass, so a wet cloth or windex will shine it right back to new!
Absolutely! I do it all the time. All you need is a Paint Pen
Two of my favorite bands are "Metallic Sharpie" and PenTouch... but really any will work.
Be careful tho! If the air pressure changes, sometimes they explode