Noob help

 From:  DannyT (DANTAS)
5358.4 In reply to 5358.3 
Hi Pete,

> What I was hoping to achieve was to get rid of it entirely.
> Don't know if its possible though...

It's possible and very easy too, in your case just select all the edges and hit delete and the trimmed area will be deleted and revert to your original surface.
Instead of picking the edges one by one you can pick one edge and hit Ctrl-A.