Minor scuffs and scratches and in grained paint or discolouration ect can often be removed/ or at least improved by judicious wet sanding with wet and dry paper water and soap....
Big deep impact gashes can only be dealt with by replacing the complete rubbing-straik...I don't think you'd ever get away (cosmetically at least) with a join....and a job for the pros in my opinion.
But hey it would defiantly be alot worse if you hadn't had a rubbing straik visited in the first place...and ultimately that's what they are for
