How does one add weakspots to a vehicle?

Ah OK so that is how you are supposed to do it, can this be done on a static mesh?

I already use a system based on what scene component was hit for determining when the weapons are hit and I hate texturing so I guess I will use suggestion 3 (I did create a system like 3 before but it would sometimes let projectiles go all the way through it without registering a hit though this was probably just me incorrectly setting up the collision.)

So I guess if the proper way involves textures I will be using the alternate way.