Making Changes to Curved Components

I’m working with a component and trying to make some minor changes. I’m new to Sketchup really a rookie so pardon the simple nature of the question.

I’ve downloaded a paddle board from the 3D Warehouse and now I need to draw a piece of nylon webbing across it’s body on the top and two sides. If the board was rectangular I’d have no problem doing this with the “follow me” tool, but since it has curves the tool is not working correctly. You can see the board at 14'0 Elite | 3D Warehouse

Can anyone point me in the right direction… please