Re: Fall breaks stock!
For metal touch up, try using a VERY SMALL amount of Flitz Metal polish. Be VERY careful as it will polish away the "matte" to the finish. As a non-abrasive, I have used car wax/polish to blend in scratches, it works pretty well on superficial scratches. I have found "Zymol" works well for this, but I think any wax or polish will work.
Learn from others mistakes, you won't live long enough to make them all yourself