How does the Workshop's vehicle repair feature work?

Solution 1:

There are 3 levels of the Work Area (level 3 has 2 variants)

• Level 1: Work area - repairs your weapon only
• Level 2: Workshop - repairs weapon and partially repairs cars (flat tires, dented bodies)
• Level 3 (Machine Shop): repairs weapon and fully repairs cars (restores to mint condition)
• Level 3 (Munition Shop): Same as level 2, but allows you to make advanced explosives

Cars parked in marked parking spaces are instantly repaired at dawn.

Note that although you don't need a Construction expert to run a Machine Shop, you DO need one to build it.

You can refer to the game's wiki page for more information.