The ISS circles the Earth every 90 minutes. It travels at about 17,500 miles (28,000 km) per hour, which gives the crew 16 sunrises and sunsets every day. In the more than 15 years that people have been living onboard, the Station has circumnavigated the Earth tens of thousands of times.
Generally, these beautiful paints are called metallic when they imitate metals like gold, silver, etc., and they are often called Pearlescent or Pearl, when they are other colors like white, blue, red, etc.
Now Pearl-Named weapons are much different than the others. Pearl-Named weapons are more like... collectables. They are pearl-plated guns (The actual 'guns' have Pearl plated on them to make them shiney and pearly white), they can be any rarity level of weapon, and are simply an attribute added to the guns.