Similar to the epic and rare part builds. These are orange class items and you need to level up to unlock these benchs (20 for engineer or 9 in the other factions)
These will all resources which are
100 scrap (easy find in battles/raids or scrapping an item)
750 wire - get wires mission in battle (need ps3000 to enter)
450 copper - obtain in raids
1000 electronics - obtain in get electronics in battle (ps4000+)
Some parts will also need three different parts (2 of each of these so 6 parts in total) which will be build in the purple bench of that faction which needs parts built from the blue bench of that faction so best to stick with one). The engineer yellow bench needs legendary parts built from other factions yellow bench so ignore this one
Credit to deathproof4289
Since the update a new bench was added to the engineer class (yellow bench)
This bench with make paint or artisan containers
The bench does require 750coins to open but does require far less resources to manufacture within.
Artisan require 900 scrap, 150 wire & 150 copper,
Paint requires 450 scrap, 50 wire & 50 copper.
I chose artisan and it worked for me