To create a 3D skateboard in one hour, you can follow these steps:
1. Open a 3D modeling software such as Blender or SketchUp.
2. Create a new project and set the units to inches or centimeters.
3. Start by creating the deck of the skateboard. Use the rectangle tool to draw the shape of the deck and extrude it to give it thickness.
4. Next, create the trucks by drawing two rectangles and extruding them. Position them on the underside of the deck.
5. Create the wheels by drawing circles and extruding them to give them thickness. Position them on the trucks.
6. Add details such as the grip tape on the top of the deck and the bolts that attach the trucks to the deck.
7. Apply textures and colors to the skateboard to make it look realistic.
8. Finally, export the skateboard as a 3D file format such as OBJ or STL.
Keep in mind that creating a high-quality 3D skateboard may take more than an hour, especially if you are new to 3D modeling. However, with practice and patience, you can create a great-looking skateboard in a reasonable amount of time.