What is craft golden, blue etc how it can be done?

Craft component to your APC ( 6 parts of APC that can be modify).

Example : Engines part, Tire part, Muffler part and etc

it can help your APC to gain more attributes on gathering resources

it is best define on certain parts and level

From Golden (highest), Yellow, Purple, Blue, Green, and Grey

4 grey items is equal to 1 green item

4 green items is equal to 1 blue item

4 blue items is equal to 1 purple item

4 purple items is equal to 1 yellow item

4 yellow items is equal to 1 golden item

The place to craft this items can be level up to the highest level as can be & more different types of vehicle to modify.

Example : Dreadnought to gain might & other attributes to your troops.