With slight magnification a green rim on the top limb of the solar disk can be seen on most clear-day sunsets. However the flash or ray effects require a stronger layering of the atmosphere and a mirage which serves to magnify the green for a fraction of a second to a couple of seconds.
Rust-OleumÂ® Specialty Chalk Board Spray converts surfaces into a usable chalkboard. Apply to metal, wood, plastic, hardboard, glass or paperboard. Erases cleanly. Indoor use only. Cleans with soap and water.
1 Run your hand across the piece to find any rough patches that might need sanding (but you do NOT need to sand the entire piece when using Chalk PaintÂ® â â even if itâs varnished!).  Remove any sticky gunk with soap and water or one of my favorite products, Goo Gone.