The Tow Mater one is ace !
Spidey one is cool too, great hexagons on that, I love hexagons, good way of shading things. About 7 years ago I saw a Spider Man themed Yamaha R1, they'd done them on that, I used it for a while as texture on helmets I did, Massa has them on his Schuberth helmet making the neon green to chartreuse fade, super cool.
Have you seen
this ultra slim micro masking tape, would have been a good guide to mark your silver lines out with. I think if they were a touch thinner it would look a little better ?
The firey one, woah, lots going on with that one.
Nice to see you turning out more good work !