Problem with double polygons!!
 

I have accidently copied and pasted the same polygons over one another.... how can I delete the extra polygons with out going through the entire object.

Alright i just tried it out with a box and i found a rather long method. Go into 3d Viewport and Select all the polygons that you see (One by One :D). That way it only select the top layer even though there are actually two of them. Make sure that you only use the 3d Viewport and not the other ones.

My 2 cents.

If you have a high poly model then that would really suck.

Easier way is to simply use a merge points command to tie the polygons together, then use the Unify polygons command to eliminate the duplicates.

Thanks mark your a life saver.