I've popped out the Gundam Marker and filled in some details on a few unfortunate Hot Wheels. Some minor, others are bit more obvious. The narrow nib allows me to get into the nooks and crannies, though a bit of mess did happen.
First, we start with the EF Civic.
Added in the black trim on the front bumper and filled in the details for the grill.
And continuing the black trim on the rear bumper.
The Datsun 620 gets details added to its front valance, cowl vents and overfender rivets.
The black backdrop makes it hard to see but the red C10 gets more details filled in on its front grill.
Visible smudging on the cowl vents. On a side note, why hasn't Hot Wheels release another variation of this truck?
Bringing out the Cheshire cat grin on the F12 Berlinetta.
I also used a grey Gundam Marker on the door and hatch cut-lines to add more depth. The effect is only so-so...
And on to the 993 GT2, there's a minor screw-up on the front bumper
It was tricky applying the details on the rear 'grill', the rear intake was a lot accessible.
Overall, I had fun trying to add a touch more realism onto my Hot Wheels. I certainly would do the same on the 934 Turbo RSR if I ever end up with one. Thanks for taking a look; I'll be looking around to see what will the next unlucky car to get 'detailed'.