One Timeline - different grades/looks?

Is there a way to have one time line where it is completed with the grade, transitions, audio effects, blood sweat and tears
And then, re-do the colour grade with all the clips but leave all the blood sweat and tears unaltered?
At the moment with my level of skill, I just create a new timeline and then cut and paste my old project into that new timeline. The only problem is that stuff like my audio changes are removed and I'm back to Ground Zero.
Is there a way to have a project graded one way and then have the same project graded a new way AND I still have access to both grades with all the creative choices of audio still the same?
And then, re-do the colour grade with all the clips but leave all the blood sweat and tears unaltered?
At the moment with my level of skill, I just create a new timeline and then cut and paste my old project into that new timeline. The only problem is that stuff like my audio changes are removed and I'm back to Ground Zero.
Is there a way to have a project graded one way and then have the same project graded a new way AND I still have access to both grades with all the creative choices of audio still the same?