Re: Adaptive Camouflage
Why did your GM nix Invisibility? Was it because he felt it was overpowered, or because it ruined plots he had in mind? Does he ban Invisibility (the power) in the game entirely, or did he specifically not want you to be able to cloak your parked car? If you use some other power construct to do exactly the same thing, isn't that really trying to do an end-run around him? I don't know how you brought it up; maybe he had an idea that you wanted to be driving around in an invisible truck, running down criminals in the streets. Maybe he has some plan that he wants your car jacked, and your insistence on having anti-carjack invisibility wrecks that.
If this is something you want, you need to talk with your GM to make sure it's okay, and to make sure it's not just one of you being a dick and trying to run something by the other.
For the record, Shapeshift works fine for changing colors, but it might not give you Concealment/camoflage bonuses if you don't pay for it. Again, ask your GM.