Quick breakdown of what was changed on the Rainmakers.

Acid Storm's look was inspired by his Cyberverse counterpart (and T30 toy to a lesser degree), with silver black and red aplenty. The odd bits of purple are there to represent his corrosive fluids leaking, and homage the purple his T30 toy used as a secondary color.

Nova Storm was given gunmetal/black and dark red to homage his edgy Ask Vector Prime color scheme along with Iron Factory's toy of him. The red flecks give him a "solar storm" sort of look.

Finally, Ion Storm received some black and white details to give him a "grounded" look along with lime and white lightning effects. It was extremely fun to work on this figure and I want to try more effects like this in the future!