I found the two Halloween decals. The first decal is in TIKI TEMPLE in the pumpkin patch chapter to the left of the ramp at the cave exit. The second decal is in BUCCANEER BAY in the pumpkin patch chapter under the first bridge to the right of the pillar. Thanks to you I have all the paint, chrome and stickers. Even the Halloween ones
About that secret map key... Um... OK we just realized we released that last build without the key to the secret map area. It's tucked away in a dev testing folder that we forgot to switch on so the rest of you good people could see it. So to all you folks who have been desperately searching for the key for the last 5 days... We are sorry! We're releasing and update this Friday that will have it fixed, and we'll give you a better clue about where it can be found. The Developer, Vector Matt
Second in Gold Rush Ridge is off track, nearly halfway through the map, youll see a skull painted on wood (the wood is whiteish and is set up as a wall or barricade but the color is different to the mountain, you should notice it if you keep looking right) on the right/on the face of a sandy mountain. Crash through it and you're in a mine (ore mining, with carts and tracks and etc in a cave) shortcut with the second spray.
From the main menu, go in collection and than press A from the controller (or check the command on bottom left corner) to open the car dedicated menu. From there, push the button for customization (should be Y)