I have a model of a Formula 1 tire which I wish to texture and and a normal map too.
The problem is that I have no idea how to have multiple UV layouts for a single object?
I would like to have one layout for the wear and tear on the tire (normal map) and another layout which will be the sidewall texture.
When I go to unwrap the tire the 2nd time, blender removes the previous uv layout 
How can I have 2 UV layouts while retaining the information correctly.
Thanks!
thanks! lol