GS Multipliers

GS Multipliers (Golden Scrap Multipliers) are unlocked at 5 Stars (6 stars before 7.5) and you get them if you reach Barrel 49 or higher. These are the multipliers:

Brick Multipliers
After the golden scrap multipliers, there are brick multipliers, with the same gaps (One every six barrels). (x4, x32, x256, x2048....)